Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e1e6e46b997d895…

MALICIOUS

PDF

69.0 KB Created: 2021-02-16 22:59:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ecf6c093d5eb1b5ead9566fe7586bf1c SHA-1: 6fd08615ddcaa627713be2a0c59c5783839ef926 SHA-256: 7e1e6e46b997d895c9e4e4c07fd8a6c8024f2a16c4c041dfac2b1961c0a9e5bf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable domains and acting as a link farm, a common tactic for phishing or distributing further malware. The presence of 'utm_term' parameters suggests tracking or redirection, reinforcing the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=contax+g+lenses+on+fuji+x PDF link annotation
    • https://nanewibogexuro.weebly.com/uploads/1/3/1/3/131382113/kamoxutef.pdfIn PDF document text
    • http://copyright-securityx.com/the_trial_of_the_chicago_7_release_date3zxzr.pdfIn PDF document text
    • http://in-arenas.com/tideboxis6bcax.pdfIn PDF document text
    • http://taher-tcac.com/xovugibutoxasewituwokigawp3g2n.pdfIn PDF document text
    • http://jirafka.space/admob_ad_size_in_android7zz2f.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/uaNUicN/fupimedojemu.pdfIn PDF document text
    • http://help-feedback-amzn3.xyz/ramirikapofomawulofudxple0.pdfIn PDF document text
    • https://verumoxozuvije.weebly.com/uploads/1/3/1/4/131407377/gugobujas.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/bowibajarukareresgpzc8.pdfIn PDF document text
    • https://pegufozexak.weebly.com/uploads/1/3/5/3/135317465/20a9a7d38a.pdfIn PDF document text
    • http://6gusevshop.website/cracked_apk_apps_freehhpbl.pdfIn PDF document text
    • http://podonebatimekel.22web.org/nusilazekosobilu.pdfIn PDF document text
    • https://kezikiwagoxarud.weebly.com/uploads/1/3/0/7/130739267/53e31a.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/jgghejj/snapchat_streak_support.pdfIn PDF document text
    • http://lusoxokurutugap.22web.org/airtel_tv_old_version.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cfd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD3 4888 bytes
SHA-256: 217e4040e09a37e706290ed439040f694e9db3b79cc12a49e3a167f0b159d3ab
font_01_sfnt_off0000e09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09D 11748 bytes
SHA-256: 3ddb2bf0e81761acdff0b86f1fdd7d7a452a2cbe321722ae62b054fb60c225c9

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