Malicious PDF — malware analysis report

Static analysis result for SHA-256 be31155ae190c221…

MALICIOUS

PDF

69.4 KB Created: 2020-12-04 20:48:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4f3fdfd0c4e49b97c148354d51379094 SHA-1: f7a20a17b560ae5911ea091deb0db1e699377060 SHA-256: be31155ae190c2213193846e35f22d76f3fd7c6253a63f9483e32496a6bea2c2
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on S3 buckets, suggesting a link farm or SEO poisoning tactic. One prominent URL, 'https://trafffi.ru/aws?utm_term=audacity++windows+7+32+bit+free', appears to be a lure for software downloads. The presence of a 'download button' heuristic further supports the phishing or malicious download lure. ClamAV detection as 'Pdf.Phishing.Trojan' and a high ML score confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/aws?utm_term=audacity++windows+7+32+bit+free PDF link annotation
    • https://porimejonawi.weebly.com/uploads/1/3/4/3/134368737/pogupi.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/lebaxa/pathfinder_bestiary_6_pawns.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/xitazimetuwagufiserugu.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/52780935761.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/wowazozi.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/61249088313.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc185bea8793968640cb600/t/5fc557a89d793648403f4e69/1606768553842/dragon_ball_z_yamcha_super_saiyan.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a7d55bcb0228a2a2fb4a/t/5fca1e28cf87d0256ff46a88/1607081513240/extreme_speed_dratini.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/88791550959.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/94891097999.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/72022529641.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_off0000c3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A3 5564 bytes
SHA-256: 90b082d09de19085108d84ba171c899748514d65e93b044594f62771fc3ccfb8
font_01_sfnt_off0000d6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B2 10660 bytes
SHA-256: ff0f94d5e8ccb11112601246bbc7b0c4995299fce4a629c62d01461d3ea21431
font_02_sfnt_off0000fb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB06 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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