Malicious PDF — malware analysis report

Static analysis result for SHA-256 f246c46a35e58dd5…

MALICIOUS

PDF

78.7 KB Created: 2021-02-17 20:44:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a5519623205921271f07c3252db1d442 SHA-1: 7dddfdbbe074d3c2c9bc2eb7cfd475c8071a56f3 SHA-256: f246c46a35e58dd50678e7698d70caa40dcce0550a1df6f4f4ba0d221a51157e
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous external URIs and is structured as a link farm, suggesting an attempt to redirect users to potentially harmful websites. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://jottigo.ru/strik?utm_term=char+broil+big+easy+smoker+roaster+grill+recipes PDF link annotation
    • https://cdn.sqhk.co/nejisakatok/ijihomZ/goodgame_empire_similar_games.pdfIn PDF document text
    • https://cdn.sqhk.co/kezavilageg/dUrjesC/civil_war_battlefields_map_tennessee.pdfIn PDF document text
    • https://zedasadexim.weebly.com/uploads/1/3/0/7/130775923/bixevuvezux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389366/normal_6018b978704a7.pdfIn PDF document text
    • https://cdn.sqhk.co/ronuwimo/icnjgjb/bake_keto_chicken.pdfIn PDF document text
    • https://roxejozojone.weebly.com/uploads/1/3/0/9/130969259/tuxom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409623/normal_6017ab089350f.pdfIn PDF document text
    • https://lukogazusewof.weebly.com/uploads/1/3/4/6/134643336/69d930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414868/normal_6009b5fee537b.pdfIn PDF document text
    • http://kraftmann.su/kikik9utys.pdfIn PDF document text
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/9860173.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/0iehjna/70933998451.pdfIn PDF document text
    • http://flylovel.com/how_to_use_serato_dj_lite_with_spotifyskrk1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404112/normal_5ffd42ed6ecfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421615/normal_5fdaac55431c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452593/normal_601b01049a7a9.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/kisagoz/49523966860.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/63315480129.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/36982076497.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/cnet_best_cheap_android_phones.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_off0000f6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A8 5556 bytes
SHA-256: 17be23c5575b6faa6aa296c7f1f81ff7c8fd6deb8ce6079f22d1dfb157d0c2c0
font_01_sfnt_off00010969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10969 10436 bytes
SHA-256: 740bd2d2f22a86e50f5be960bd756d254bcb05949174f204bbdf1f2be9d85a69

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