Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ada01e8e03de45d…

MALICIOUS

PDF

117.0 KB Created: 2021-07-23 13:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 65e3c25c9ce63802e332947d1d9aedd9 SHA-1: 2c3882babd920ae7c4d2faff22209e77302c19d0 SHA-256: 9ada01e8e03de45d7ae667383cb61f567b1ca12d2806d85f48ab45711b241dea
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely to lure victims to malicious content. The presence of multiple PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

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 http://bahattinburyan.com/userfiles/file/jazipuxamura.pdf In PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/9ce59373cfcded7b3cae41d18b50d04e/legawusemogiz.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/46a5fdf05cc6a31ad50846e9ae2e4b71/84647039150.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/nebubebobize.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160965f96e36fd---89744858936.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/suwibar.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dfa670dbe05---2818947259.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5fe03beef---zotemuxoxavadigufasa.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/i297j262jt7pp6on38bj94l293/zotujasupexixa.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/15328129306.pdfIn PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/56076453703.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b4408a2a7---pizepag.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/16542062679.pdfIn PDF document text
    • http://streetnn.ru/data/upload/ck/files/posowezosemefafi.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/34149677702.pdfIn PDF document text
    • http://teenaramainc.org/clients/875997/File/61660599091.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a821d306e---berorojed.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/4408578569.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cfc49395582---zetipurubanu.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fb521d9d4---91733409625.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/walisa.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/pefd5t0qlrh6cb5frl1tm15v7e/29827634528.pdfIn PDF document text
    • https://rcvizovice.cz/ckfinder/userfiles/files/93640472323.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/47088a619a7525866f393905ec0ccb6f/lojukafixuf.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/6d4c1ce9bc90d7805468a7db8ac3dca7/vawowuburemazidu.pdfIn PDF document text
    • http://tcihk.com/userfiles/39367865998.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=elementi+di+biologia+e+genetica+zanichelli+pdfPDF 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_off0001637c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1637C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B93 10980 bytes
SHA-256: d1531e83584b2440e3d837078c69ceed35dca63f1400314a987115feb7c0a0c2
font_02_sfnt_off0001945c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1945C 19240 bytes
SHA-256: 68b4fd276cf570069716484d6c05d0791e8918d67f8928ed0702175f397f43e2