Malicious PDF — malware analysis report

Static analysis result for SHA-256 023b1490da7ef7ce…

MALICIOUS

PDF

76.7 KB Created: 2020-12-05 12:40:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cc5300a2048999f0f2afec4732ba5a21 SHA-1: d873a074644d91e359b3e49a6bd265db999c5a98 SHA-256: 023b1490da7ef7ce4274445193d7c8b46c81c52b9f001411ec9ed7999bf5bc49
156 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 0.9998

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 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=interdynamics+mac-134+ez+chill+refrigerant PDF link annotation
    • https://dimejozetef.weebly.com/uploads/1/3/1/0/131070151/jexujujefuv.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/5fbfd8a92bbd740658005df2/t/5fc354875147b148049d717d/1606636680882/horoscopo_diario_leo_profesor_zellagro.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1034b6609fd0ee791ebdc/t/5fc5a812fa04221c71e33b27/1606789138872/uzi_airsoft_gun_electric.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e0fba5bc066edfbf0e5c/t/5fc5083a7acac6192a5fbaf1/1606748218606/85492049743.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc56f7ad49dd1244752cb4c/t/5fc6c99b0791337046cfb409/1606863260192/will_heartland_season_13_be_on_uptv.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11b4016f6d44b07c000b4/t/5fcaf6a58dcc5603beeb87a8/1607136936099/wizarding_world_of_harry_potter_orlando_hours.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10fb5bda9c57a97bf17be/t/5fc155213c6ccf69f38fc306/1606505762850/13563456162.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e8305687f52b6b812c21/t/5fc129e6a97599144e213ae3/1606494695108/pulp_magazine_price_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29d8640f1034a5cb3e639/t/5fc3d462eaf37e3b641165e1/1606669411353/vaxagidawunufimevuzixubo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0de27085bf90c0efce9ba/t/5fc172ee1972c46e3cd59a86/1606513393203/rabugakujipa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc695edc6229360ecd44eb8/t/5fca4ccbe4017829c17830fe/1607093454618/car_crash_simulator_roblox_wiki.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f05df9866f3fd2d48fd4/t/5fc44b22f8cdb769c66c529b/1606699813645/reproduction_worksheet_for_class_8.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/fox_super_shop_parts.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD84 5536 bytes
SHA-256: aa8a49a9ee7aac073c3325263aada58d0d61a61694fb872fb5b9984e5b7e2917
font_01_sfnt_off0000f042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF042 11484 bytes
SHA-256: 15a77a31a36ca80554aa60462318acf29714b06bab5889af536acaf13e3c7323
font_02_sfnt_off000117bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117BD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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