Malicious PDF — malware analysis report

Static analysis result for SHA-256 734f1c1e5da663bf…

MALICIOUS

PDF

74.1 KB Created: 2021-02-24 07:57:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7973e3be72ca4bf5d1054772f0347c60 SHA-1: 678f08569f285cc739866d414757f02c07cd5d64 SHA-256: 734f1c1e5da663bf11f67619b07d3d36399e829717e865f87b66b77577396161
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or link farm document. It contains numerous external links, many hosted on disposable domains or link farms, designed to redirect users to other sites. The presence of these links suggests an attempt to drive traffic for SEO spam or to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/wix?keyword=sushi+los+alamitos+menu PDF link annotation
    • https://cdn.sqhk.co/mewovegid/gdaGiij/heartgold_rom_zip.pdfIn PDF document text
    • http://voirlo.xyz/28904687142hza00.pdfIn PDF document text
    • https://cdn.sqhk.co/tokititagiwe/tnidFjb/mulexanozoxinefetijamapum.pdfIn PDF document text
    • https://nesajejegumexe.weebly.com/uploads/1/3/0/7/130776687/morowuvexigufa.pdfIn PDF document text
    • https://cdn.sqhk.co/xopigotax/gqcXiaU/thrift_stores_in_princeton_nj.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabudoxuwa/gqOZhiA/dolepefu.pdfIn PDF document text
    • https://cdn.sqhk.co/vedasukuki/dHvMCgi/75422287110.pdfIn PDF document text
    • http://bcipreactivaperu.com/53228823666o7xjq.pdfIn PDF document text
    • https://xasevezivim.weebly.com/uploads/1/3/5/3/135302984/9716b29.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/azjbthf/83752115826.pdfIn PDF document text
    • http://znakomstva18x.site/permutation_and_combination_aptitude_questions_and_answersl2424.pdfIn PDF document text
    • https://duxudalo.weebly.com/uploads/1/3/4/8/134866109/gazojevuk.pdfIn PDF document text
    • https://bigimegena.weebly.com/uploads/1/3/1/4/131438437/zatowebe-mexupoledofajij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/kedelanimewinubuve.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/punctuation_exercises_with_answer_key.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AB 4928 bytes
SHA-256: 809ddea8beb1b990d98cc12b030e46269cd4e54ef50d7dc2e21f93eb25b4e413
font_01_sfnt_off0000d7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F8 4816 bytes
SHA-256: 63c03ca8c89b629b91b4b41dd9bde4615a4bf891da94c126d7db23bb4f6d30c8
font_02_sfnt_off0000e823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE823 10372 bytes
SHA-256: ecb02437632e929448c0d218c65422161dcbbb909174a49229c599df196a3c26
font_03_sfnt_off00010b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8B 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

Open this report in the interactive analyzer, or submit your own file for analysis.