Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3bacaa9cfdb05c7…

MALICIOUS

PDF

80.9 KB Created: 2021-03-22 01:26:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7a1c20f0ed621cb5be491045e03bd0e9 SHA-1: 1df5d9f493dfee2a993a16f5bb1e99426576cd80 SHA-256: f3bacaa9cfdb05c7cc66da72ecb854555f2d7a7da929ae5361d97ca1d28b3464
156 Risk Score

Malware Insights

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

The PDF contains a high number of embedded external links, with a critical heuristic flagging it as a potential link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or SEO abuse. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://zajinet.ru/wix?keyword=experiment+12+empirical+formula+of+a+compound+lab+answers PDF link annotation
    • https://baboxubawuxi.weebly.com/uploads/1/3/4/6/134666135/lamonoropabe-pipolej-lepifawakasuw.pdfIn PDF document text
    • http://love-cosmetics.shop/5267750525395pw2.pdfIn PDF document text
    • https://xuvupidorok.weebly.com/uploads/1/3/1/4/131407629/b457f209258c3e.pdfIn PDF document text
    • http://gmetry.online/safety_rules_for_visitorsxv9kc.pdfIn PDF document text
    • http://terem.space/97795738194zlmvb.pdfIn PDF document text
    • https://lafupoboj.weebly.com/uploads/1/3/1/8/131857117/916679.pdfIn PDF document text
    • https://boxesagako.weebly.com/uploads/1/3/4/5/134589877/00751.pdfIn PDF document text
    • https://virenejamavik.weebly.com/uploads/1/3/4/1/134131854/db900f70d1f89.pdfIn PDF document text
    • https://jaxenexeleti.weebly.com/uploads/1/3/5/3/135320290/mazen.pdfIn PDF document text
    • https://puluzoxaxidu.weebly.com/uploads/1/3/2/6/132683087/pegapifizofij_gowexonopibu.pdfIn PDF document text
    • http://genoray.pro/sibivilrxsoe.pdfIn PDF document text
    • http://limuzinof.ru/how_to_determine_rifle_scope_ring_heightu8q4z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/blackberry_z3_autoloader_10._3._1.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/the_toltec_art_of_life_and_death_review.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/pojomozideturozilejikunas.pdfIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_0821d9b908e7459da064fab39cab480a.pdf?index=trueIn PDF document text
    • https://4abf464d-34d5-4c80-8de5-e64f30e04530.filesusr.com/ugd/8b3eb5_61f46c9ebb4e4e40ac52bad182102708.pdf?index=trueIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_a81b6f33da58439b8d277e1af3ea4007.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/taxekafekegaroz.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/vipavunelaz.pdfIn PDF document text
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_d6487004efb14e7d9c23379fd34284cb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lunojol/open_android_emulator_without_android_studio_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/23388673899.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/soxosapo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E3 5744 bytes
SHA-256: a0cb411abd6c64c66850a1d0ef4886906770eac6886b3846c0d7946030c876f6
font_01_sfnt_off00010d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D72 11176 bytes
SHA-256: cf4399008d5d0028f5cfb325a80af9ff4a1695648aa303ef14f818820be8ec84

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