Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed56924cd5ef1232…

MALICIOUS

PDF

91.7 KB Created: 2021-04-23 12:10:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 345f5b9bf744dc4423864c872a83c93e SHA-1: b41d4c1b741aaaa33de2612d1a234d3eae389ac8 SHA-256: ed56924cd5ef1232f508358567060eca408d024a4d5d0154b0734344a1d6b6da
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting an attempt to obscure the final malicious destination. The document body, though heavily obfuscated, appears to be a lure for a service manual, which is a common tactic for phishing or malware distribution.

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://druttle.ru/strik?utm_term=honeywell+pro+6000+service+manual PDF link annotation
    • https://letezinujafi.weebly.com/uploads/1/3/4/9/134901841/mipitemolew.pdfIn PDF document text
    • http://kujinatazema.sportsontheweb.net/lugikekubula.pdfIn PDF document text
    • http://pekibimige.mygamesonline.org/54536839127.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489607/normal_5fdca602ad083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393349/normal_604e6f8bf3790.pdfIn PDF document text
    • https://kinijenu.weebly.com/uploads/1/3/4/6/134641264/piwokaje.pdfIn PDF document text
    • http://maporivibadiwaj.iblogger.org/97257852605.pdfIn PDF document text
    • http://dobataxip.iblogger.org/mimizakosesebawepadaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402933/normal_603e434ac94fd.pdfIn PDF document text
    • http://sapinatuligoro.22web.org/46029594699.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuxozodapapugu.epizy.com/gexewut.pdfIn PDF document text
    • http://lozekav.epizy.com/badminton_game_full_information.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/unix_shell_scripting_with_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/manual_autocad_civil_3d_2020.pdfIn PDF document text
    • http://dinixebun.epizy.com/28389962966.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/jokatar.pdfIn PDF document text
    • http://kexubibefasow.rf.gd/singapore_international_arbitration_centre.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/16077771842.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_off00012406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12406 5592 bytes
SHA-256: 22d343c7b806e311fe50840e35cd99dc30c6786cab3d2b883c4b1ae18318fe97
font_01_sfnt_off0001370b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1370B 12252 bytes
SHA-256: 3cf2d34ff8eb8498e7390993ff1e52e30cc3487394f1ec498fec161366c21e38

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