Malicious PDF — malware analysis report

Static analysis result for SHA-256 a45f55c02919ad56…

MALICIOUS

PDF

114.0 KB Created: 2020-12-02 23:30:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f9562b79d58381d5d5c38ce85f78171d SHA-1: 16cfb82cc219777d27a31aeb63e972267cc96f51 SHA-256: a45f55c02919ad56f21ed716099574ed6c04cd91c3cb7a7a16929c8f3d614c5c
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a link farm and an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, appears to be an attempt to disguise the malicious URL as a search result, likely for phishing or malware distribution.

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 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.
  • 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://trafficel.ru/strik?utm_term=inflatable+projector+screen+rental+near+me PDF link annotation
    • https://jarofudi.weebly.com/uploads/1/3/1/4/131408364/1440872.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://static1.squarespace.com/static/5fc3205912facd59cebb7138/t/5fc5b8f2eaf37e3b646256ab/1606793459107/6712881850.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc169c2bf71053ccb13c602/t/5fc5c05c4f98375720a6135c/1606795357004/ruud_hot_water_heater_dealers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a834abaecd33182d7d6c/t/5fc5b49ce6d49a06bb58a38a/1606792349029/zitoxerutakinul.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e5b8a3bf4b14aba92f9c/t/5fc170664f9837572015e6c0/1606512743662/big_pine_lakes_weather.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/mw2_titles_and_emblems_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1d9ea43b1e1740435f00/1606229409478/the_illustrated_encyclopedia_of_essential_oils.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/present_tenses_exercises_with_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5d54e6d49a06bb8969f6/1606376789760/dijup.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc535621452f90b7f014908/t/5fc664e8f8cdb769c6beafb8/1606837480716/6590617724.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc116c5bdb33045eec368a4/t/5fc3c5c07acac6192a339c76/1606665667131/silver_chloride_powder_formula.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd273e87c90448ba1a0248/1606231870746/35407163808.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_off000173ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173CE 5052 bytes
SHA-256: 651669786eba386dc19e04958d5361e97da42f423f53b311d71779f2c14bd1d0
font_01_sfnt_off000184e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184E1 12372 bytes
SHA-256: 7903434e4a6549b9cc498e930c9b6d749a55a9930edf8e5b646087cfa5ab037e
font_02_sfnt_off0001acad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACAD 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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