Malicious PDF — malware analysis report

Static analysis result for SHA-256 7566f85f4481415a…

MALICIOUS

PDF

83.4 KB Created: 2021-09-06 16:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: d3c8d8b51389f73fda1eb5adbbab1fdb SHA-1: dc1437a2925b455416df96b470b8a2d1d63ba48a SHA-256: 7566f85f4481415a7ccc154184ae286470f46535e7a517d3a9af6aa9a970e297
176 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or tech-support scam. It contains a link farm pointing to numerous compromised websites, likely intended to redirect the user to malicious content or phishing pages. The heuristic 'SE_CALLBACK_LURE' specifically indicates the document's intent to trick users into calling a phone number, a common tactic in these scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://drafthe.ru/uplcv?utm_term=peer+e+kamil+in+urdu+pdf+download PDF link annotation
    • http://dlevitin.ru/fck_editor_files/files/60370177601.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/vunesabadaxilepitirif.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/88262574835.pdfIn PDF document text
    • http://alocainghien.com/uploads/userfiles/file/misuzaza.pdfIn PDF document text
    • http://bigband-ulm.de/userfiles/files/bujigo.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c97030ce784---nokadu.pdfIn PDF document text
    • https://bepxuyenviet.com/upload/files/nopulazafoxutugezev.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/1306caba261f5cb736f7380ff8adc2bb/dabawunejovaxupo.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/2b9fac841c68bac4f693733b90358904/640711973.pdfIn PDF document text
    • http://kleinschaden-expert.de/userfiles/file/xobesokarojiko.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/a9f9e54786e30d0e1c5653eac6435018/xuximopebosuxibikadupu.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/15e5a0a4333244eda6866744e552065b/66896202352.pdfIn PDF document text
    • http://thegoshow.net/userfiles/file/jasofowuragerudopugod.pdfIn PDF document text
    • http://joomlacode.org/fckeditor/editor/filemanager/img.php?file=file/33971128913.pdfIn PDF document text
    • http://ehhs1969.com/clients/6/67/67a0fa02f482ea8575b7cec7429e43a8/File/61895106946.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/8258a8f0ae0047c12425e82c05b665ce/kulurebafuj.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/kepojuwem.pdfIn PDF document text
    • http://uralinteh.com/uploads/files/5715098778.pdfIn PDF document text
    • http://giadinhlaurenso.org/upload/files/wisubupixajibafonisan.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/39680716349.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/23fb2818bdc1a923330f6fdede9756de/kuvefis.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae00d957a45---11418188351.pdfIn PDF document text
    • https://beautyreviveshop.com/newerac2c/userfiles/file/4313865668.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/dader.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/7da5af19b371350e0f104169345a058f/zinopexenurigon.pdfIn PDF document text
    • http://lnyy.cc/uploads/file/1629581576.pdfIn PDF document text
    • 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_off0000d951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD951 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF168 10672 bytes
SHA-256: deb7a804ab3bd73768c8f462c53513d2da553d54ec464ca7f90600c5cf95df8b
font_02_sfnt_off000109cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CC 20752 bytes
SHA-256: 1817f4959e092cad3b8dadc7d0d8b4d83480cd237602965e2aeafc4c0ff3161c