Malicious PDF — malware analysis report

Static analysis result for SHA-256 6261a17d22202145…

MALICIOUS

PDF

84.5 KB Created: 2021-06-27 14:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9387835ec774354ab7982bf9caeb23a5 SHA-1: c9ab57503ac5a1f0db0859373c3ed4a1d6ec2b2f SHA-256: 6261a17d2220214568d2f3f9c5e2e4770de06d65e3a153a225b066425ec6f3c7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users. The 'SE_URGENCY_LURE' heuristic suggests a phishing pretext, and the ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and link farm are typical of phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://emrc.ie/upload/imagecontent/file/bakolaj.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962a6c6cfd6---bufitone.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607805ebc8632---65873580529.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160747e97ec77b---jumuvutejevadomofepef.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/76d020a182fec91aef933d458b76abc5/niwizadanemajek.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/d5ca31559d1f9ea03567246c661ef6df/fojixirabemutozedakobaxap.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/fof8201np1gp0e2g79qj2d65sv/kaninagabedotirukupo.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/a46f506093d96d7de6aa86917e096e2e/nafaj.pdf
    • http://poltinka.ru/userfiles/file/80655124963.pdf
    • http://oldtimerclub-thueringerberg.at/images/file/90999818593.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b67e83f1440---16892980101.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe4797c66b---73322360941.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/f4bb868bb7da3ee7fc5f23cfd21dcc77/vowiwudepabu.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f63eed86e7---renibejewuzejozab.pdf
    • http://openendrep.com/userfiles/files/tikabusebobusujupukuxalep.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/78c5026c4ad4cc39ef41645f907ab1b5/bukewu.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16089f13422821---fotule.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a096102eb8f---fifurikolilabisojo.pdf
    • https://kis-u.com/page_data/file/20210624114953.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/2e049f968e7bf40f31b67e1191d1a168/92807966918.pdf
    • http://garderoba.sk/images/_file/88975841423.pdf
    • https://akapacha.com/userfiles/file/62433403787.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/b6fac2f40f3b73709b01ebb8d7e8ce4f/28745102236.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=madrid+to+canary+islands
    • 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_off0000ea83.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA83 16792 bytes
font_01_sfnt_off00010295.bin
7506cbf10f9fbb9e4f03651933a5a5fe6a0072d32ec2b34ad50868efd6b34f89
pdf-font-stream PDF embedded font (sfnt) at offset 0x10295 16496 bytes
font_02_sfnt_off00012da0.bin
f73b529215ec2087e5e81195ca4d72316486fcd679cf3fc210b1122c6b81ecb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA0 10340 bytes