Malicious PDF — malware analysis report

Static analysis result for SHA-256 34469567df64bc2b…

MALICIOUS

PDF

83.5 KB Created: 2021-08-25 06:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 16a68906757556365a2f0b024fd252ed SHA-1: 9853bb633c48a613fe47c2c31c4b2637f970a678 SHA-256: 34469567df64bc2b0bd8062adc3cd62bf865cd8ff33abbcd85ac5a79c1c29f58
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. The presence of a 'link farm' heuristic further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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.
  • 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://monyetmesum.com/contents//files/wosuliwaf.pdf In PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/muvifamesa.pdfIn PDF document text
    • http://stickerbarcode.com/file_media/file_image/file/gukalikuperogibun.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0bd27f635---kerusuxup.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/togavu.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/vopigabozazadidipoki.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/telorev.pdfIn PDF document text
    • https://ourlady-schools2.com/userfiles/files/xukopelemutitapikegoge.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/11537897878.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/4eab9c6d766a4d1fae28e9fb0fbe40eb/vogovekit.pdfIn PDF document text
    • https://partnermind.cz/images/files/67126434236.pdfIn PDF document text
    • https://tasteadmin.com/ckfinder/core/connector/php/custom/wysi_uploads/files/10479546285.pdfIn PDF document text
    • http://aatmicscience.org/asuserfiles/file/fijupanovi.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/72692066339.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ac68e5d6d4f65ebc24955be12e01aee7/pelifiwinuz.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/i017ugch136kldinpbeskebad7/56230089923.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/gs7jhrfu6ue1sgv2ehi1pitbm6/sivigu.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/ec8c068893ca32e1c7f6e5c5e1415906/waxudafuwok.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab2d188e7f---2934573852.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/lodexifavelapo.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/2evudpcta1v1mbdldqdvhaqa9l/34671506951.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/41440786809.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/a271k5td3173nag4451kb9941h/mosuniwumebufine.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=appstore%2B%2B+download+iosPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E2 16576 bytes
SHA-256: 0c2120caad16abe9a9bf283bfd3d0c37782d1ff5cbb09e4814ee246fa2815f53
font_01_sfnt_off00010f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12791 10452 bytes
SHA-256: f729040cd9bf2b7a587cc44a4a980da35df8fd8e8c966ede76ee5c9f3c0b8307