Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e3ae932ed84fe2e…

MALICIOUS

PDF

78.5 KB Created: 2021-03-25 18:44:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 879ca882c2e26ca40bd9d496a8c60285 SHA-1: 9434994999af5c7156ac257dd5bad2b1f1c0fc6c SHA-256: 1e3ae932ed84fe2ea6d30b76f29843ec951ddeac2ce4d8816c425a8f83147a8b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a high heuristic score indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://druttle.ru/123?utm_term=baskerville+mt+italic+font+free
    • http://onsideball.info/wulawog8rx2.pdf
    • http://daddytestit.xyz/zipadebekemirilejh7v76.pdf
    • http://domen3.club/dexolozeminetosaxe137k0.pdf
    • https://static.s123-cdn-static.com/uploads/4471686/normal_5fe5e2fa91767.pdf
    • https://static.s123-cdn-static.com/uploads/4416921/normal_5fc8816b20329.pdf
    • https://cdn-cms.f-static.net/uploads/4386073/normal_60492a9e4cca8.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • https://static.s123-cdn-static.com/uploads/4445750/normal_5fc700bcad5c5.pdf
    • https://cdn-cms.f-static.net/uploads/4467043/normal_5fea4283850d6.pdf
    • http://sodalabs.pro/ganesh_vandana_song_pagalworldtr42o.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xugigabitulu/19170090336.pdf
    • https://f8b57e9d-e272-4783-b6f5-6420e6b93425.filesusr.com/ugd/886b73_32d37f4e824c4fa4b58354a4e6040e55.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b053b921-0934-4313-b1e5-4afaae7a1188/is_lucifers_twin_brother_an_angel.pdf
    • http://xebenuxod.rf.gd/girapesaz.pdf
    • http://gaguvidub.epizy.com/13589081008.pdf
    • https://uploads.strikinglycdn.com/files/399ba2e7-1fe8-45df-833d-0578481a65b4/the_secrets_we_keep_kate_hewitt_ending.pdf
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_8fcfc4959b1041c4bf20c3ce42d51257.pdf?index=true
    • http://xowevabi.epizy.com/11011436323.pdf
    • https://s3.amazonaws.com/tibanepoxilibud/78801646992.pdf
    • https://uploads.strikinglycdn.com/files/8515cb8d-3661-4fee-af74-f3723eeeb8b5/myers_briggs_personality_types_characters.pdf
    • https://s3.amazonaws.com/fuwuzerijofa/jurassic_world_evolution_dinosaur_stats_spreadsheet.pdf
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_efca14eea0594b93b8ced2060f5c4979.pdf?index=true
    • http://vizawog.epizy.com/segikimixojiji.pdf
    • https://uploads.strikinglycdn.com/files/79540171-3f26-40bd-9cf1-848b439f6dc6/libavupa.pdf
    • https://s3.amazonaws.com/padosumifubobo/how_do_i_winterize_my_rv_camper.pdf
    • 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://scripts.sil.org/OFL
    • 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_off0000ddad.bin
05f5f323c1f5f905cd93c2e601d91d61114fe6fcc7e9cde5655a059c925dfda9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAD 5200 bytes
font_01_sfnt_off0000ef57.bin
f916a636265e2280b4b78419905cc0f8f9a016014fc1e1761ab64b5f2ada1e94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF57 11932 bytes
font_02_sfnt_off00011780.bin
e5245523bd71a78e06ca3300da63f55ad096e28dd8c1a5e83e138be64f7d0aee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11780 16084 bytes

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