Malicious PDF — malware analysis report

Static analysis result for SHA-256 048ad30d2aa6569d…

MALICIOUS

PDF

73.0 KB Created: 2021-02-17 03:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 12e3afb572b928ca334833e8254d494b SHA-1: fdd93d3fa51c49e9dfc5ffbcff9bbffd42f7faf4 SHA-256: 048ad30d2aa6569d192f6a7b794b29652791ee61d643f30901f68402ee5d969c
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many of which are hosted on disposable domains, suggesting a phishing or scam lure. The PDF structure and embedded URLs point towards a tactic of redirecting users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=kitchenaid+coffee+grinder+replacement+parts PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4392649/normal_600658660ed0d.pdfIn PDF document text
    • http://optamorem.com/koxatimufir5bg9v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423750/normal_5fd67da30b87b.pdfIn PDF document text
    • https://cdn.sqhk.co/tawumemikuva/scGidmB/oscar_de_la_renta_bella_essence.pdfIn PDF document text
    • http://madokedaxemosu.22web.org/linux_administrator_resume.pdfIn PDF document text
    • http://finansi-7.online/nozuragisejonadecr9h8.pdfIn PDF document text
    • http://nimened.66ghz.com/ganezefogojazuguku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482216/normal_5feb773f28abf.pdfIn PDF document text
    • http://sedovarubabozop.iblogger.org/meleravi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486356/normal_6013a57e2c50d.pdfIn PDF document text
    • http://nilofebep.iblogger.org/fiditexizolupemuvarowi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418558/normal_6019b6bec6883.pdfIn PDF document text
    • https://cdn.sqhk.co/videgogaf/byhdCjj/76436592558.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://joveteki.epizy.com/87476350148.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_off0000e01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01D 5536 bytes
SHA-256: 06f967a705812aa16d2fc56f76e0054ee1a1b8b633beb1d724301beb2762fdce
font_01_sfnt_off0000f2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D3 10732 bytes
SHA-256: f128e88f87347c50d763241c6a4bbcf51d0eb12a641c2fcab8deac6e7f68ebf6

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