Malicious PDF — malware analysis report

Static analysis result for SHA-256 9256f081260a3faa…

MALICIOUS

PDF

88.1 KB Created: 2021-06-26 16:20:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aaedfad5b1b02096086ddffc3a332040 SHA-1: f406d1630d6f5e04d56e67fdea90cd14ac2b1565 SHA-256: 9256f081260a3faab69bfe335276ebb48b586c2845f5f718fb0704a461bf76b7
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple URLs, many hosted on compromised or disposable domains, designed to trick users into downloading further malicious content. The primary attack vector appears to be social engineering through deceptive links, likely intended to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://meruzhankhachatryan.com/app/webroot/files/file/bemimukumodanagabozizu.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607441dfb5dc6---bubabifiku.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b167c20dbec---84014224646.pdf
    • http://didopack.com/files/gasaminijuvojijidofujasep.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef86bcca48---koxiwigogozumomi.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/fb17d59100105cecf7fadaf03f6285d2/15823417712.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ddc577db5---mifufaredonukaxivu.pdf
    • http://xn--80an2aej.xn--p1ai/up/file/40792002262.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c391d924f3---21341328435.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/37tsv6iq2o9baguv2e5i5v2mpt/wawikanadawuvud.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/v2e7afmn2ro67dk0gtank3o1u5/38866886701.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9f183b902---vefemozu.pdf
    • http://flygarfield.net/userfiles/file/vetinejezedogevulamubeg.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609049385a91e---nagebuwawal.pdf
    • https://acronimocostanzo.com/userfiles/file/26234736044.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccdad163ee---56578677180.pdf
    • https://agentcctv.com/userfiles/file/97105714540.pdf
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/lofif.pdf
    • http://pastoret.it/userfiles/files/41802146855.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/a517283efd13fdd04cd27fe0b30e0cb4/60944352103.pdf
    • https://thieumaunao.vn/workspace/develop/uploads/ck_upload/files/fizetekanoge.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16094cc5db4967---rupulewegumotaxizijero.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=contra+nes+game+download+for+android
    • 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_off0000f5e1.bin
1b1bfb7ae3645b7f050ca909bd443bab885de2cb9d045fd40d4a5f4dc9eb7151
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E1 17072 bytes
font_01_sfnt_off00012271.bin
47b8fddd9cfc55d435f655a6647784afe17910817cbd13e69935a21231721c4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12271 10812 bytes
font_02_sfnt_off00013b3e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B3E 16792 bytes