Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eccc205f25e4757…

MALICIOUS

PDF

67.9 KB Created: 2021-02-08 14:18:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d1f2b23d8e06d0ceefc24f94f9acb0b4 SHA-1: d1a4d632b5fb9d8b54802e725082f8b10079e678 SHA-256: 7eccc205f25e4757cc06170c9c41cb3acc6ad895e50ead929e6371edfcb6fcdb
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing or trojan delivery mechanism. It contains a large number of external links, suggesting a link farm intended to direct users to malicious sites, and includes an instruction to disable security software, which is a common tactic for malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://jottigo.ru/123?utm_term=block+city+wars+mod+apk+god+mode PDF link annotation
    • https://budojidotepaso.weebly.com/uploads/1/3/5/3/135312143/jijezod-danubomafi-gaxurepa-bitukisakej.pdfIn PDF document text
    • http://in-arenas.com/5186385214phpt.pdfIn PDF document text
    • https://rupokolox.weebly.com/uploads/1/3/0/8/130813141/napisejorokoxaru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460975/normal_5fffecaa6762d.pdfIn PDF document text
    • https://voganesabif.weebly.com/uploads/1/3/1/1/131163538/2867502.pdfIn PDF document text
    • http://gogotaf.iblogger.org/wesego.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/falevi/quran_recitation_with_malayalam_translation_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/arcsight_flex_connector_configuration_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/best_bible_app_for_android_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/70665918887.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/98309171229.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/college_board_sat_practice_answer_key.pdfIn PDF document text
    • http://jedigox.epizy.com/tetijobalunujazuzijunifi.pdfIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/fixot.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/48991610426.pdfIn PDF document text
    • http://xepalufozakot.epizy.com/saxinep.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_off0000cb38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB38 5700 bytes
SHA-256: ae1343a9857ff5c7c185ab347b032a5e60a24146c2a83c6ae2d6ae5c27007987
font_01_sfnt_off0000deb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB1 10564 bytes
SHA-256: 9dd855e0e059e9929d913d7659cbf26f82ec8c3a35140501e1693972d3697ae8

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