Malicious PDF — malware analysis report

Static analysis result for SHA-256 981ef4384b42abcf…

MALICIOUS

PDF

80.5 KB Created: 2021-03-15 17:49:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: dc6678446a2f3d7aaefc5a96e04641e1 SHA-1: 3a63fb69f4db9e57f44c9fbc3e4c29996f3fb35a SHA-256: 981ef4384b42abcfd6aaed2b2720a8131beebc8da4cb3836299c6af3a66a021b
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, specifically as a phishing or trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs indicate an attempt to redirect users to potentially malicious content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://lozipotod.ru/wix?keyword=st+james+the+less+catholic+church+perris+ca PDF link annotation
    • http://fortuneo.biz/air_force_academy_football_uniforms_2019cx1y3.pdfIn PDF document text
    • https://cdn.sqhk.co/mojafefegamo/cNoB2fp/fifa_world_cup_2022_brazil_qualifiers.pdfIn PDF document text
    • http://bigmagazin.xyz/bodubosonawo27ypx.pdfIn PDF document text
    • http://pss77.ru/present_simple_and_present_continuous_exercises_with_answersvn650.pdfIn PDF document text
    • https://gobufitiribe.weebly.com/uploads/1/3/5/3/135321776/6804972.pdfIn PDF document text
    • https://monibobur.weebly.com/uploads/1/3/0/7/130776122/bipawew.pdfIn PDF document text
    • https://vepibasizux.weebly.com/uploads/1/3/1/3/131380915/906944.pdfIn PDF document text
    • https://gavebinakufir.weebly.com/uploads/1/3/2/3/132302735/8242659.pdfIn PDF document text
    • http://straponartist.com/75182453954ub3o2.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwalimo/hhiiKlP/sirocco_fans_12_volts.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/goviwigax/echo_cs-450_chainsaw_specs.pdfIn PDF document text
    • https://83372c7a-1065-4b07-8284-b64562b46e84.filesusr.com/ugd/035489_6f6699783e5b4b00808b1e631f91ec60.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/03e04207-d209-41c2-b921-6ec2721224ee/wonaze.pdfIn PDF document text
    • https://9e2b3e3a-6a02-4d3b-8ba9-5acc01041672.filesusr.com/ugd/66c878_0698f2f82d774168ba61bd5f760d2eaa.pdf?index=trueIn PDF document text
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_77e7cde62904467fbad1c15459b200d8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/40e4da2c-d977-4f41-80d8-f7561ef7d50f/how_to_make_a_90_degree_gutter_elbow.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/udemy_app_android_version.pdfIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_88076a12a0b34cd2b8338d222e719fd0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/xumudupivo.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/50818989561.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_off0000fa8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8C 5352 bytes
SHA-256: 22a2ac8be34c04363fa6cbbc6fe569930d894c7c1b49d380ea805ee97d665bdd
font_01_sfnt_off00010c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C98 12468 bytes
SHA-256: 64ef33317da9275d8176041cd407f448f0c31d7c6c7d72249a10e4cf7a3df866