Malicious PDF — malware analysis report

Static analysis result for SHA-256 47554d219bc1dbf4…

MALICIOUS

PDF

73.0 KB Created: 2021-03-22 22:40:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42e88085efaadb539c35a4dbdd9b1ddc SHA-1: 7db6bd3bd1127a9a85ad49634989bac12233834e SHA-256: 47554d219bc1dbf483636fd43ebea154568d5ed16f512ebc3aabe686eb5ac7c1
126 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 malware distribution attempt. It contains an external URI pointing to a suspicious domain, likely intended to host malicious content or redirect the user. The document body, though partially corrupted, suggests a lure related to a common task, which is a typical social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://resalured.ru/strik?utm_term=how+to+load+brads+in+a+stanley+bostitch+staple+gun
    • https://cdn-cms.f-static.net/uploads/4476434/normal_605854ed3792e.pdf
    • https://pujuxuzanebov.weebly.com/uploads/1/3/5/3/135351243/3502627.pdf
    • https://robidolaw.weebly.com/uploads/1/3/0/7/130776002/4226815.pdf
    • https://cdn-cms.f-static.net/uploads/4452607/normal_605793c6e96f8.pdf
    • https://todisosoban.weebly.com/uploads/1/3/1/0/131070867/344a127811.pdf
    • https://lopamazaveseku.weebly.com/uploads/1/3/4/6/134643240/cb43f580ed5.pdf
    • https://sazulolako.weebly.com/uploads/1/3/1/4/131453808/2f77ff84523.pdf
    • https://static.s123-cdn-static.com/uploads/4459625/normal_5ff3257b9d2cc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://c3438639-6a75-4920-aa4f-d1e0b619354f.filesusr.com/ugd/3be3a7_ba0a1f8040874f3e920b96a4d2d27473.pdf?index=true
    • http://nimobavaze.epizy.com/judukekilegidogux.pdf
    • http://lesigoviweti.epizy.com/zokokadopuveminalejuje.pdf
    • http://nixuverojezuluz.epizy.com/hand_operated_capsule_filling_machine.pdf
    • http://vulewibof.epizy.com/76964091011.pdf
    • http://kukadafimi.rf.gd/46680150213.pdf
    • http://kutoduno.rf.gd/90000881719.pdf
    • http://mutupoda.rf.gd/45769794872.pdf
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_fe89a5dc5bc940ce98ee3e69b2576a04.pdf?index=true
    • http://lamupilabixekuw.epizy.com/bukimine.pdf
    • http://tibupud.epizy.com/vazoxenep.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2fc.bin
2fe052e5dc85549704b1262d530b820e9158f8139d9dc34f671b30eb69b44704		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FC 5512 bytes
font_01_sfnt_off0000e5be.bin
7d93d826ba6c0cdf1c11340e825b9e04da6e5a24542848117a9b7b774d002b96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BE 10124 bytes
font_02_sfnt_off0001086c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1086C 4324 bytes

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