Malicious PDF — malware analysis report

Static analysis result for SHA-256 597f3162bd4e08a1…

MALICIOUS

PDF

78.3 KB Created: 2021-03-19 04:49:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 274c3908dcf3e83ff6f6c735793a087d SHA-1: 208310c9bc6485583f53273ee7e3e0496a93b1a9 SHA-256: 597f3162bd4e08a1598bac37f6a3847c04aa4a370b59af47fb44b457328e2217
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=what%2527s+wrong+with+american+beauty PDF link annotation
    • https://cdn.sqhk.co/gisatajofo/iighJgn/tavovupet.pdfIn PDF document text
    • https://cdn.sqhk.co/lowanivari/jfU6yhj/xerovorokivafaj.pdfIn PDF document text
    • https://cdn.sqhk.co/zevukodixu/9geigit/20611742136.pdfIn PDF document text
    • https://valojeruxul.weebly.com/uploads/1/3/4/6/134681631/9426192.pdfIn PDF document text
    • https://cdn.sqhk.co/denugesugumu/giZgiIv/buwuf.pdfIn PDF document text
    • https://mujunuduxur.weebly.com/uploads/1/3/5/3/135327440/gepinemumekedumapot.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/fgihcel/xuzuwopofiturumukan.pdfIn PDF document text
    • https://somigoduwus.weebly.com/uploads/1/3/4/4/134470899/tinijazujowoximekigu.pdfIn PDF document text
    • https://gilasagajeradek.weebly.com/uploads/1/3/4/6/134632792/mujeweroderezi_fuxowikowiwi.pdfIn PDF document text
    • https://mudizuponiwox.weebly.com/uploads/1/3/2/7/132740987/zuxirexufefudufitu.pdfIn PDF document text
    • https://cdn.sqhk.co/totudavomud/Y2sHjf1/82288002127.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/Cnjdbf2/international_marketing_notes.pdfIn PDF document text
    • https://katebobuwusa.weebly.com/uploads/1/3/1/3/131384636/gizigatozat.pdfIn PDF document text
    • https://tudogevu.weebly.com/uploads/1/3/2/7/132741144/98794995b458.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/zupenafud/fafowiviton.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/passport_renewal_application_form_ds-_82.pdfIn PDF document text
    • http://jazosorolanik.rf.gd/18824387813.pdfIn PDF document text
    • http://pijewonizitubi.epizy.com/44154708582.pdfIn PDF document text
    • http://setixebasedi.epizy.com/96754404231.pdfIn PDF document text
    • http://kubazemaxem.epizy.com/chori_chori_full_movie_hd_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/world_travel_vector_free.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f20a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20A 5560 bytes
SHA-256: 61e50ec7d7f15ba60be3f1e5d63720f7622f175a30e2f8b7fd8e2350453e0535
font_01_sfnt_off000104f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F4 11388 bytes
SHA-256: 55f34380c9bb054d4e7f01ea012748e067a94d7d02995e5bbe832263c242f625

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