Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c7fffe900ca9fb3…

MALICIOUS

PDF

74.3 KB Created: 2020-12-06 00:13:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 0c8997d7475f79f73575017ef9eb9261 SHA-1: 85c6792fcbc6bdba4fad8b3de23f24f9b9f0019a SHA-256: 4c7fffe900ca9fb3cae942b4626d71f5ecbe3705b6749ce4999941798892a5d5
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'trafffe.ru' with a 'netflix android app link' query parameter suggests a phishing or credential harvesting attempt. The PDF also contains a link farm, further supporting its use in malicious activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/aws?utm_term=netflix+android+app++link PDF link annotation
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/bewomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369182/normal_5f8954e96a235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369654/normal_5f88a789721de.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/5fc292a4e5c7695ca9a65d9d/t/5fc950d094ab3b034b0650bc/1607028945105/susib.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/alldo_android_smart_watch_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/vekagusosimekivenoninago.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e3ecc14dfd36fef16b99/t/5fc16c814e98326c0245dec9/1606511746373/guvokapoxireregedidof.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/51787355882.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/rogers_tv_channel_guide_brampton.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/barrett_m99a1_review.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_off0000da50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA50 4748 bytes
SHA-256: 3ee6999875cfd757845f018a2eb731bb8ad9b587ae165bc6d32d848dea2e2f03
font_01_sfnt_off0000ea7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7E 10724 bytes
SHA-256: b6be4f50c748dca4258ae18cf7306b91a4d8a10033e05fc2b73db8cb1e957ee3
font_02_sfnt_off00010ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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