Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af912507ea56c1f…

MALICIOUS

PDF

95.0 KB Created: 2021-06-30 09:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4eeaf4e2c88444deb86215fd4086296f SHA-1: df187f581bf36ea6bdcae92bba2d4c1a586f365d SHA-256: 7af912507ea56c1fb604467be63cf9dadf570615c5488955ba6fa977dd6269ad
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farm heuristics, indicating a primary purpose of redirecting users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URLs point to compromised CMS uploads and disposable hosting, reinforcing the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607912f98b96c---supugepatapadiladakogi.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3863d39b19---diregutapowuwetax.pdf
    • http://maduraigarlandshop.com/userfiles/file/litusitabedeputorizu.pdf
    • https://stiff.pl/ckfinder/userfiles/files/fosametavodovafoxo.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c74fed5b91a---19023804919.pdf
    • http://richmore.kr/uploadfile/fckeditor/file/47013564837.pdf
    • http://penzionklara.cz/userfiles/file/muvotexogulo.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/038e4a6181f8af23908481572ed2ecc6/tojekeso.pdf
    • https://efnnma.org/files/file/terifedagixatez.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a36bb02a2---84952209337.pdf
    • https://kurek-rowery.pl/user_pict/file/3413457483.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7389eb6c2---saxeli.pdf
    • https://33mobility.net/uploads/files/balof.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/3792c05965ca2fc8e6e1fc326ff39474/vutusuxerotogesi.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700fe3619d8---55230676007.pdf
    • http://2478.ru/admin/ckfinder/userfiles/files/24452485577.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/srrl0ae51a4tn9r2v9np2k7n0h/kagixutizunogojefazomuj.pdf
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/powerexujefafi.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/vkm5gr3miotb5ft06qk6644br3/medikakufenonebefeto.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bc32aae55a435041cf94c007e011bba3/85401995360.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cac9da529a3---86964698831.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/643050843.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c486eed67b---durijanetovavuvagabas.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d682b2f1077---tejajuw.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9863715be8---fobajasojadasiveguwowifu.pdf
    • http://lineshare.net/upload/files/20210617115202.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6ce337496---musuxabudalu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=pro+tools+free+download+full+version+cracked+mac
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c8b.bin
77ff759161982ed8ddc97a38a019f3a1a664f4ebb1b1a60d4e8f836509a2d304
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8B 18136 bytes
font_01_sfnt_off00013c5b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C5B 16792 bytes
font_02_sfnt_off00015472.bin
499ea069482e4f8629c1b0c5189202178700d8ef897902b5bf1383c5b7f13390
pdf-font-stream PDF embedded font (sfnt) at offset 0x15472 10984 bytes