Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec981c72302289e…

MALICIOUS

PDF

69.9 KB Created: 2021-03-13 21:02:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 309c7fe46f9aa29f1225a167e4aa1659 SHA-1: 7f4a01ac0864ead9078bff846f6acd1d0baadde8 SHA-256: fec981c72302289ed562326e730bd85540a80cd1aa5694d45509b839a71998c2
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as educational materials, indicating a link farm or phishing attempt. ClamAV detected this file as Pdf.Phishing.Trojan, and an ML classifier also flagged it as malicious. The presence of embedded URLs suggests an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/award?keyword=benim+hocam+tarih+2020+soru+bankas%25C4%25B1+pdf
    • https://cdn.sqhk.co/vidoperife/vLgheig/prison_escape_puzzle_walkthrough_level_4.pdf
    • https://static.s123-cdn-static.com/uploads/4496378/normal_6003428cb3c7e.pdf
    • https://cdn-cms.f-static.net/uploads/4404490/normal_60300b5dc749a.pdf
    • https://motefeka.weebly.com/uploads/1/3/4/1/134108707/7819658.pdf
    • https://dinasozuze.weebly.com/uploads/1/3/1/3/131383342/dulal.pdf
    • https://static.s123-cdn-static.com/uploads/4417658/normal_5ff540b2bba11.pdf
    • https://sanorasawuvut.weebly.com/uploads/1/3/0/7/130738762/xogijanopi.pdf
    • http://kizidotiz.iblogger.org/losimisu.pdf
    • https://cdn.sqhk.co/wediximewoza/SFjncia/fake_call_prank_lite_girlfriend.pdf
    • https://cdn.sqhk.co/bamazaludez/jeeDhcv/panasonic_video_camera_live_streaming.pdf
    • https://cdn.sqhk.co/dugukiser/jetW8lR/visosilinudipukopukojaz.pdf
    • https://static.s123-cdn-static.com/uploads/4413867/normal_5ff7fe91428c5.pdf
    • https://cdn-cms.f-static.net/uploads/4377403/normal_6012c220abfef.pdf
    • https://reboxulowewo.weebly.com/uploads/1/3/1/4/131407709/9154133.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_704af0207c4a4d3ba4c7ee5cc306e341.pdf?index=true
    • http://nerelikeg.epizy.com/hitman_agent_47_2007_movie.pdf
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_4b88610fc0b147209507db7d605a7832.pdf?index=true
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_ea1d7025968f48d6a6659b96f9cc08fb.pdf?index=true
    • https://41be308f-8a64-4dec-8b30-4937605be974.filesusr.com/ugd/f042fe_9939db890124492fb964c863208c82c4.pdf?index=true
    • http://luvurukakun.epizy.com/putotunagizamizaxoxijap.pdf
    • http://naxinusidado.epizy.com/86011562007.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ceac.bin
da64ddc2415544cea011b47cd90c03ba8c1c10043d18a167470a1fe9932a6f7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAC 5924 bytes
font_01_sfnt_off0000e2a4.bin
016ed230ec5b56c2301754957a95dc829731fd151ce40d7a14aa24981715dab1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A4 11704 bytes

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