Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a547015126baccb…

MALICIOUS

PDF

82.6 KB Created: 2021-03-20 14:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4ac0a5390fa4ff044d54c9569d94d829 SHA-1: b56a6d9edb6de869610143865b4a45abb4053b18 SHA-256: 5a547015126baccb14a5955789c8e1671e115fa4c20019cb26956f76205a50e2
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 0.9992

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://soxebez.ru/wix?keyword=st+patrick%2527s+day+parade+2020 PDF link annotation
    • https://fusikejasuk.weebly.com/uploads/1/3/0/8/130874124/ligorabir-ranudaluku.pdfIn PDF document text
    • https://gisimezibeze.weebly.com/uploads/1/3/0/8/130874543/zafir.pdfIn PDF document text
    • https://vizejuvevu.weebly.com/uploads/1/3/2/6/132681979/811910.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391047/normal_604ba44544562.pdfIn PDF document text
    • https://kutikeso.weebly.com/uploads/1/3/4/4/134490414/2de19afbc.pdfIn PDF document text
    • https://midusafamiriron.weebly.com/uploads/1/3/4/7/134702540/eccdb9047f60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449406/normal_600818674d0ec.pdfIn PDF document text
    • https://vugopese.weebly.com/uploads/1/3/0/7/130739154/jesubukoxoj.pdfIn PDF document text
    • https://popetufuwude.weebly.com/uploads/1/3/1/4/131483025/6280964.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384028/normal_6013bb8cb2c08.pdfIn PDF document text
    • http://gagipelujer.iblogger.org/casio_sgw_1000_2b_manual.pdfIn PDF document text
    • https://badupulok.weebly.com/uploads/1/3/4/8/134855905/duwuwisus_gitopumivupase_gemexiwegi_revubiwis.pdfIn PDF document text
    • http://fimozagori.iblogger.org/2017_ford_ranger_fx4_owners_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461511/normal_6002a7aa9ba62.pdfIn PDF document text
    • http://betixisu.22web.org/military_time_cheat_sheet_printable.pdfIn PDF document text
    • https://xugeguva.weebly.com/uploads/1/3/1/4/131438310/5871107.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://uploads.strikinglycdn.com/files/26cc25e7-bbef-47ae-aa53-e6fa8fccf0d5/pojawunupo.pdfIn PDF document text
    • http://mopezuvo.epizy.com/kedazopu.pdfIn PDF document text
    • http://jomimil.rf.gd/towivaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5d09cdd-7b9c-4811-a9d0-98dc45392bf5/berserk_manga_ending_discussion.pdfIn PDF document text
    • http://benifolagalat.epizy.com/carry_on_rainbow_rowell_espaol.pdfIn PDF document text
    • http://misofex.epizy.com/ruroju.pdfIn PDF document text
    • http://sazojojuw.rf.gd/where_should_i_donate_my_clothes_near_me.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF660 5184 bytes
SHA-256: 1483e7585dac80e550f13401f9c4ac27c96579f6bd8a6b7c7513ca2d83eb129d
font_01_sfnt_off0001081b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081B 11128 bytes
SHA-256: 582583a93704e7e5c78996be0d2da41efdffee591afb4b1e9f643c7f65ec4e86
font_02_sfnt_off00012d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D60 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f