Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc6a7165fda1ec9a…

MALICIOUS

PDF

95.7 KB Created: 2021-03-17 04:49:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b39fb4e8b42925e893c65c7778dcfd6c SHA-1: 797fa76f7e442d91ce001a03c2c0d92648262713 SHA-256: fc6a7165fda1ec9a7db3f9b9d4009cfc45dea8db5b0f108579d80e3de67e2645
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or redirection mechanism to malicious sites. The document body is heavily obfuscated and appears to be generated content, further supporting a malicious intent to obscure the true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://pelibifir.ru/strik?utm_term=what+exercises+build+strength
    • https://niritopep.weebly.com/uploads/1/3/4/6/134634222/vazoviparegesak-fefapaf-terolilofifiri.pdf
    • http://novemipet.22web.org/vefowamezut.pdf
    • https://mizevazorabij.weebly.com/uploads/1/3/5/3/135347525/91fb51dd66.pdf
    • https://joxunirefebemi.weebly.com/uploads/1/3/4/3/134319414/xakalolubivoporox.pdf
    • https://temerineg.weebly.com/uploads/1/3/0/9/130969052/8345349.pdf
    • https://zavisedifigi.weebly.com/uploads/1/3/4/3/134316550/kusoduxazofize.pdf
    • http://pafunote.iblogger.org/communication_worksheets_for_high_school_students.pdf
    • https://static.s123-cdn-static.com/uploads/4476015/normal_5fe3bec75b537.pdf
    • http://korirojasutito.22web.org/19604202610.pdf
    • https://voberugupov.weebly.com/uploads/1/3/4/4/134496708/mulexifewizegexana.pdf
    • https://cdn-cms.f-static.net/uploads/4469106/normal_5fd1e4f865b75.pdf
    • https://cdn-cms.f-static.net/uploads/4422908/normal_60512c63d59dc.pdf
    • https://muwegegedagus.weebly.com/uploads/1/3/0/7/130738526/5558300.pdf
    • https://dorulitonen.weebly.com/uploads/1/3/1/3/131380258/7bdfb07bb4950fc.pdf
    • https://jofufibiwew.weebly.com/uploads/1/3/5/3/135347649/bf913ab0883fd.pdf
    • https://vadurevagide.weebly.com/uploads/1/3/3/9/133999829/pebisu.pdf
    • http://doporujela.iblogger.org/benazir_bhutto_song_pagalworld.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://desibevazivoxan.rf.gd/90006976365.pdf
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_0fa8e891ed914c9fa5e0bdb3b5ea68ec.pdf?index=true
    • https://b36ad067-21ef-4b17-9055-1dfcbb3fb98c.filesusr.com/ugd/8673ad_19d8a8fe1eaa492bad15b85d9bb3740e.pdf?index=true
    • http://zemamivata.epizy.com/adiabatic_process_thermodynamics.pdf
    • https://e055bcc9-c4f1-4c6c-8dcb-0912bf54750f.filesusr.com/ugd/b4a829_a383648d553a49af891c8faf63de65ce.pdf?index=true
    • http://zuwapiw.rf.gd/chef_hat_clipart_vector_free.pdf
    • https://bc881323-2374-4635-a2b7-f126f9929bd8.filesusr.com/ugd/546a35_8a5864d60eb04cf6a6ece05ca779b580.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b4e.bin
d897186dd9cba3a051cdcafb704259a47837a43790f197bd2749ef780af37688		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B4E 5196 bytes
font_01_sfnt_off00013cf7.bin
51b548251a02b77da5437c3b1c07f73ceb94fa64fa54570d29c6e9ae28c89de7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF7 11212 bytes
font_02_sfnt_off00016325.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16325 4324 bytes

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