Malicious PDF — malware analysis report

Static analysis result for SHA-256 43c706496442bb6a…

MALICIOUS

PDF

66.0 KB Created: 2020-12-02 19:35:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 16731ebdfdab7d4fd32abb34eaa0d9fe SHA-1: df7735647f951bcf7956d6997031016b39d6a762 SHA-256: 43c706496442bb6a38c164ebb06e1100a2c79f035156ed71d68ce6d7c02e69c7
156 Risk Score

Malware Insights

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

This PDF file contains heuristics indicating it is a phishing document and has been flagged by ClamAV as a 'Pdf.Phishing.Trojan'. It includes an external URI pointing to 'https://traffnew.ru/aws?utm_term=bloons+td+battles+mod+apk+android', likely a malicious landing page. The PDF also contains a link farm with numerous external links, suggesting an attempt to manipulate search engine results or distribute further malicious content.

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://traffnew.ru/aws?utm_term=bloons+td+battles+mod+apk+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421783/normal_5fa15ac629f71.pdfIn PDF document text
    • https://nuduxojobiri.weebly.com/uploads/1/3/4/6/134629521/rineniwip-misuzitonotuz-nasuvubit-pinerixe.pdfIn PDF document text
    • https://xinorexuvon.weebly.com/uploads/1/3/4/6/134608307/jufev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce79a115-f801-4c8f-9473-6436cd636345/pipekekujirev.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc532fde2fce462bca7fa8a/t/5fc62c733570fb44d1d52a38/1606823032204/ding_ding_dumpling_union_city.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39cff14a-d672-4cb5-aa92-c876c778e270/99750435756.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc225bd9-80e1-4d6e-afad-8785109d35d6/tones_of_a_poem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccf1ccc4-3ac6-4036-8732-919c8b5e3d91/avid_pro_tools_12.8_crack_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbf6befd-6e63-4af2-9e04-1afb3b983e1e/remigagomezete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94b43163-a996-4a90-8b38-ffb4d5a53a19/metaphors_in_romeo_and_juliet_act_1_scene_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cc51ad6-f2dd-44c0-9323-a46fd4703af5/kristin_seifert_decarlo_rick_astley.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae5f82af-0511-4d68-a140-aa8dd4736cfa/70025847041.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd1e0c89e1c4b8fb81223/t/5fc1c8caf81c9a2a0ce40ad3/1606535371417/buxemojaba.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_off0000c6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AC 5356 bytes
SHA-256: 8a82b990dfec4499699775bd6ddd4eb5b897154647bcae4e99ea3901fe8925c5
font_01_sfnt_off0000d8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C5 10144 bytes
SHA-256: 229f8bba02583e58697d6f8b8a27952a921fd96245803fc41a8a42fcc9c0b7b8

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