Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d566a014136d839…

MALICIOUS

PDF

209.9 KB Created: 2021-06-27 19:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 692ffa6bf220d828d567ea18feb3685b SHA-1: 33c74c96b3c06423dbcccd3225f93caa7a356754 SHA-256: 5d566a014136d8395e3c40332fd629fcd21e9a4382d99698c10533a5249b5dfa
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains an embedded JavaScript stream and utilizes a link farm pointing to compromised CMS upload storage, acting as an SEO redirector for phishing. The primary attack pattern involves luring users with a deceptive link to download a malicious document, likely to facilitate further exploitation or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9703

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://cafemsoffice.com/userfiles/files/wetoxubivexonomuv.pdf In PDF document text
    • http://www.tobywells.org/media/fckdir/file/27464160756.pdfIn PDF document text
    • http://to-kajihan.net/js/upload/files/37716729292.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c161488c1d4---43065367648.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608daf52c8066---15352181107.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/ee0gok8h501i3vcuh2ef74rsbl/36381684565.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/ef2u3etb6naqejp59idfc6r25a/vofumoliganukesipe.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/laxizizimonep.pdfIn PDF document text
    • http://dhf-china.com/d/files/senasabupaxelunuxemu.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/kiq89idl86e8g9nb6q8fioher0/budetibunesotiviwub.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16080b96b60e06---mipekagaderiguxonigaxelir.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/de1261002471a39df0c8ac5b97174f72/wikazofomesivep.pdfIn PDF document text
    • http://envigest.cz/upload/file/bezizaniturutafazu.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/fazupenalumipemobevakudi.pdfIn PDF document text
    • https://ikima.fr/uploads/file/gatabatuwebem.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16071d111be998---31362438937.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/4fg2v9c15l4tgkqd3dipui3sbn/joziwibafoxakavidizet.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/4vhfpnfjibm6kf41kdb64532ad/wukufesizuwapaxufepapi.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/ng5j5obob18eaovifer03s0095/pamudokufe.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/43e5934aa69beb3cd5009fd073bd405e/57156412530.pdfIn PDF document text
    • https://svarovanijelinek.cz/ckfinder/userfiles/files/laloropokixekigisewovod.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee171118a2---rodazorifezexuzoga.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/52191714723.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/b8bd829737abdc793d00b9310fe7b0a8/ximuvuvagapesoxopexasuzen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=kiss+the+rain+fingerstylePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002dbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DBE1 10476 bytes
SHA-256: 204e57d92ab33db7cea7721da95d56ef20f771ea114b3ae2b501a92798c40ea1
font_01_sfnt_off0002f3a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00030bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30BB6 17816 bytes
SHA-256: e688e5f067332aab9dc8a461b299acbe5e884971b93fd50ec5dcbbfef5320beb

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