Malicious PDF — malware analysis report

Static analysis result for SHA-256 47efaeefc4cb6dcd…

MALICIOUS

PDF

88.1 KB Created: 2021-07-08 11:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aec98735b24bb916eece655af7b74d35 SHA-1: c1d309543feafd00759d87316df22004c2b41e5f SHA-256: 47efaeefc4cb6dcd1b86869ebc500dd458a738bf4fb8286157800693ab516f95
164 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and other domains that appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct textual clues to its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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://alpha-cp.com/userfiles/file/73855328937.pdf
    • http://bagiez.com/userfiles/file/xekelomebibuvopu.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae75e4a849c---nusekuberexuveriwove.pdf
    • http://akgikorea.com/file_upload/fck_upfile/file/kofuzemalefumaru.pdf
    • http://shipsupply.ru/userfiles/files/magugigoxokimegazunobiw.pdf
    • http://cesishotel.com/res/wysiwyg/file/marojexozivedagapojixu.pdf
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/i19qbt4fr7ckqlh5a8o51ppnth/dibobaweji.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d3e2b30d890da5360eb1f04f106e69d5/ditisakitasevim.pdf
    • http://auapp.ch/userfiles/files/warejupetezefida.pdf
    • http://aarogyamedico.com/userfiles/file/garoparivuxukavuduvavu.pdf
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/c242bfdad070e4f43c8c06fa024dfe0a/83967988728.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bab443623---zuxirafarodukexux.pdf
    • http://sacoorhealth.pt/site/upload/file/zijidozatimakutomivete.pdf
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/fugozomesifujajawalevop.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/b9e55416327c43e4af74263d8bd6523e/55156038388.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16091ba8e9dd0c---35065305357.pdf
    • http://samurairamenbar.com/uploads/files/zatuximef.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee5e56fc71---44130619684.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c90fe289b54---22375161942.pdf
    • https://twinslock.com/ckfinder/userfiles/files/37840873207.pdf
    • https://mps-india.com/userfiles/files/dawinewuzenu.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/7b74a69df333c821ca4d1ea795faaf5b/pegobuluvuxu.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/aaae1ac907a41844fad4c0b9243f2335/mesonesodoxuzi.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160741e43d9ab5---nupuxafunisom.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608853a325d89---xawezutubabi.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/s6d6tmoq995lsfuqij7u3ht9ju/dikikerinefusetakap.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=lady+crush+meaning
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df6c.bin
fc96bb51e68212267b34b5acefce01e3ce1e469c7be8c0a453211fcdfa4f682a
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6C 16120 bytes
font_01_sfnt_off0000f4bb.bin
2d448ad7de3178a78cf66219b2f5f87732f8400b58519a9307ba4653a80f22cd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BB 17904 bytes
font_02_sfnt_off0001225c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1225C 16792 bytes
font_03_sfnt_off00013a73.bin
590ed40e99250a891e5c80e78e30d416f5c1570af022ed99d3aa1c85f382797c
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A73 10724 bytes