Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e832997053d6408…

MALICIOUS

PDF

84.6 KB Created: 2021-04-19 10:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aded178d52dfdbe07eee7eb47e98c76d SHA-1: 613026d5914c66a9cbc2833fa6aaa47330a4ab91 SHA-256: 7e832997053d640861b35f1beed6b7f20d1b84d23da5f3bd49505dff20561a2b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm, suggesting a phishing or SEO poisoning campaign. The document body, though partially corrupted, mentions printer setup, which is likely a lure. The presence of ClamAV and ML heuristics flagging it as malicious, along with multiple suspicious URLs, indicates a high likelihood of malicious intent.

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://resalured.ru/strik?utm_term=how+to+connect+hp+deskjet+2546+printer+to+wifi
    • https://delujopasetew.weebly.com/uploads/1/3/4/3/134399242/pazamiserunerun-pifibololefope-ferixupi.pdf
    • http://com-connexion.xyz/sebitazatumalekimobubaru1g4m9.pdf
    • https://cdn.sqhk.co/gatuwaven/wjjHjdP/mavanuxozufetetik.pdf
    • https://wokesije.weebly.com/uploads/1/3/4/5/134597961/917b5432ca.pdf
    • https://cdn.sqhk.co/sejujona/ficHY8s/turbo_stars_game_download_for_pc.pdf
    • https://static.s123-cdn-static.com/uploads/4453328/normal_5ff9fd1004f29.pdf
    • https://cdn-cms.f-static.net/uploads/4365655/normal_600cfcf120d73.pdf
    • http://douchehub.xyz/jemapetijanenexurutesot3vbw.pdf
    • https://gixipimeno.weebly.com/uploads/1/3/4/3/134310045/kurusulaxuz_rijamoxunona_susofaguperaf_woridujixus.pdf
    • http://sokfresh.fun/701196930251n7dr.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f6d62b13-b37e-4be0-8a9a-e69362646d79/tarukerusoraverigigow.pdf
    • https://1cd0d4d5-11d4-440c-a307-81f73801f601.filesusr.com/ugd/f0e51d_8443aa69da074512884b0536132b7102.pdf?index=true
    • https://cb38ef3f-1f2c-4622-8962-dca261660167.filesusr.com/ugd/3ae201_9275c3d30fee4f7fb5ac165d85d0b36d.pdf?index=true
    • https://35057dd6-1d18-4acd-96c9-af3b7fddc7cd.filesusr.com/ugd/978dd5_5709b6aa68594878911aa1bc23796e41.pdf?index=true
    • https://uploads.strikinglycdn.com/files/75c2a589-e8e3-4a10-82d5-52124430899a/79904433459.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_off00010d20.bin
8bacc50138bfb4c2b7ba17689502dddcba99002e50eecd843217e0460ff19434
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D20 5692 bytes
font_01_sfnt_off0001209d.bin
62173d5188792697b6d337fb29d34e1fd86f8fb229d08f3a0918e7be51cb6922
pdf-font-stream PDF embedded font (sfnt) at offset 0x1209D 10996 bytes