Malicious PDF — malware analysis report

Static analysis result for SHA-256 492b67205c5ff712…

MALICIOUS

PDF

271.8 KB Created: 2021-07-05 11:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 7100000d9a75e1d46c9bce6363f9252a SHA-1: 37c29855349d7c63887a45c0a58dc9cf010527dd SHA-256: 492b67205c5ff712ff4e6a46a4a96c98e73f9a9c62d5827306aa2d50e3403abc
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress upload storage, acting as a lure for phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9779

Heuristics 6

  • 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.
  • 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 https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/d323fc4578323448f066199bbfbea6e9/24214819990.pdf In PDF document text
    • http://huntland.hu/upload/file/ganorilikel.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/fatepilukam.pdfIn PDF document text
    • http://chieusangducphat.com/uploads/userfiles/file/wajuza.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/ccf2f81fc9b1eb6cbd4ccfb106ae0ede/tolesipapoxoboxurufuzun.pdfIn PDF document text
    • http://okwmd.com/upload/fckeditor/file/88845057365.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/90207218404.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9e4a56f5a---lazotizez.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16099e17ac5973---70925598374.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/adbba84bbe57a79869d2b4de7b44d26d/bunajedeporabawak.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/nobazojiteje.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/54876510262.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/f5fa10f79de97e5fe3fd136749180a5e/rirofelilik.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/4611880201.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941e2c5441f---35378149101.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/573de702e2a774f88f031d52a0d32514/71017874875.pdfIn PDF document text
    • http://waterreducer.cn/d/files/508097764.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/rokijisomanobanasixatuzus.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e7d45f6f0---1095977035.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbe5091d6ab---84274430364.pdfIn PDF document text
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d471a2f838---54749916957.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160759e24e8da4---16459382209.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b0e4413c9---179324204.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=moses+son+of+godPDF 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0003adc4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3ADC4 25924 bytes
SHA-256: 9225c73bdced73d74b0685dd1946e34802e00de288f73b72e5b9eca3e6245e18
font_00_sfnt_off0003979b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3979B 10024 bytes
SHA-256: a8754666bf953496b11c236dc46b7b9f98249292650c9d01594ce7e5410e0751
font_02_sfnt_off0003dcf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3DCF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0003f504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F504 25336 bytes
SHA-256: dbadb973baaee540250593529904c4a614088459d3b1bab38fc1d6ede3decc8c

Open this report in the interactive analyzer, or submit your own file for analysis.