Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b70e9dd11f7edb4…

MALICIOUS

PDF

93.0 KB Created: 2021-02-28 12:55:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bc392bec6ad245ff11fffa4f953b5983 SHA-1: 07e88f8638721927ac3afa6b8c319de15a003db8 SHA-256: 3b70e9dd11f7edb4cad7cc168bf70726af4c0604f8b0bc668db2247775746a1c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent. While no scripts were extracted, the presence of many external links suggests the document's primary purpose is to redirect 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://mezovuduw.ru/strik?utm_term=is+nikon+coolpix+l340+a+dslr PDF link annotation
    • http://jolixasij.sportsontheweb.net/what_are_reactive_oxygen_species_ros_and_how_are_they_generated.pdfIn PDF document text
    • http://copyrighthelpcentral.com/judoxebesirufolebuzopavenmsac3.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/jevomemulofezepixoxoroj.pdfIn PDF document text
    • https://cdn.sqhk.co/pojimisuso/iiihdID/ringworm_groin_rash_pictures.pdfIn PDF document text
    • https://cdn.sqhk.co/dafibuxoki/aiiw9gf/47614115132.pdfIn PDF document text
    • http://espaceabonne.com/42702771087xoayc.pdfIn PDF document text
    • http://kind-insta.site/zimilovujoxezanakotebadipyxi0.pdfIn PDF document text
    • http://axecheat8.xyz/is_ffxiv_worth_it_2020uhyxg.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/95889239205.pdfIn PDF document text
    • http://baltika-trans.com/bewitched_theme_song_freekrd2h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://zirutabu.myartsonline.com/43956192472.pdfIn PDF document text
    • http://nabenejajoko.myartsonline.com/are_sun_lite_campers_any_good.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/46594497458.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001070e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070E 5532 bytes
SHA-256: 728e091337cd5028150b0cfcabf4de5c2ba43d59fc516f10524f0ecd420d19fa
font_01_sfnt_off000119f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F4 12008 bytes
SHA-256: f2c3e8ec9df9b6d67d5190f70fec574d0e4df4ece6ce6a40c282423797ea443f
font_02_sfnt_off00014186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14186 11772 bytes
SHA-256: 275015c52194f465566d04a7be03a727240de5c62569ef56f32a0f169ee0582d

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