Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b0e070008b5eb75…

MALICIOUS

PDF

81.6 KB Created: 2021-06-01 18:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a55d38abb31136df5ff20b800309113 SHA-1: 1252b46ba057c5b68b1c91f29f9eded5f49e479c SHA-256: 1b0e070008b5eb75e815b8642c1d5f71adc95975a7cc3f48bdbd3374a4b5c6ec
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate maliciousness. While no scripts were extracted, the PDF structure and numerous external URIs are indicative of a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/wb?keyword=sears%2018%20chainsaw
    • https://lalonofinesuver.weebly.com/uploads/1/3/4/4/134442061/8310334.pdf
    • https://zikowipon.weebly.com/uploads/1/3/5/3/135300096/furuxevuwulu.pdf
    • https://rixodinek.weebly.com/uploads/1/3/5/3/135392020/798d6e59f1391d.pdf
    • https://gowubezu.weebly.com/uploads/1/3/4/4/134497845/mizojotugazakokotoz.pdf
    • https://gitokivoj.weebly.com/uploads/1/3/4/3/134316846/natida.pdf
    • https://jokinurelebuvet.weebly.com/uploads/1/3/1/8/131856462/4962799.pdf
    • https://kowasazupajobex.weebly.com/uploads/1/3/1/3/131383373/4f7f88d3db8.pdf
    • https://lepitosamodovax.weebly.com/uploads/1/3/4/3/134335454/910f62c0.pdf
    • https://zabidikigez.weebly.com/uploads/1/3/4/5/134594795/lotijepa.pdf
    • https://xepesirivow.weebly.com/uploads/1/3/1/4/131408502/8309475.pdf
    • https://xolasugoduto.weebly.com/uploads/1/3/4/5/134592704/lipov.pdf
    • https://pezufefak.weebly.com/uploads/1/3/4/8/134865979/mevako-degurejugaz-palipebexepijo.pdf
    • https://nivozigagu.weebly.com/uploads/1/3/4/4/134439663/lakegovunurej.pdf
    • https://kuvuwivozud.weebly.com/uploads/1/3/6/0/136091804/2987713.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bemulopawed.pbworks.com/f/wafukiludobesi.pdf
    • http://giwupiraride.pbworks.com/w/file/fetch/144455292/what_are_the_major_differences_between_absorption_costing_and_variable_costing.pdf
    • http://vejivab.pbworks.com/f/how_to_add_friends_on_switch_fortnite.pdf
    • http://mumubib.pbworks.com/w/file/fetch/144414021/10709649390.pdf
    • http://xosufixemuf.pbworks.com/w/file/fetch/144442488/learn_to_speak_arabic_app.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_off0001020d.bin
4c100637dd7b88dc6024f5351e3501344d3eebcbd5b1fccc5eceed03702dbe36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1020D 5296 bytes
font_01_sfnt_off00011421.bin
a826e57ce0b0f3e9ac5da31c67696a6024df2a6788f6b498ff4f702693f26e9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11421 10908 bytes

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