Malicious PDF — malware analysis report

Static analysis result for SHA-256 a83deaf00d400679…

MALICIOUS

PDF

66.6 KB Created: 2020-12-21 01:44:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 93eb00ffe8dd5b7c21a312d9bbdcbed3 SHA-1: 9de3a24bfd5bc70ff284e8458a0f7ca887982c9c SHA-256: a83deaf00d4006791cf0d835ee7ed8e2d17b52e512a397ec99f1df2c95950320
156 Risk Score

Malware Insights

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

The PDF document is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The document contains a large number of external links, many of which are embedded within the document body, suggesting a link farm or phishing attempt. The presence of embedded JavaScript, though not directly analyzed for specific actions, is often used in malicious PDFs to exploit vulnerabilities or redirect users to malicious sites.

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://trafftec.ru/aws?utm_term=common+core+math+worksheets+answer+key PDF link annotation
    • https://molegogadamo.weebly.com/uploads/1/3/4/3/134341439/saxenixikuzasibexeze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473938/normal_5fdeac37135f1.pdfIn PDF document text
    • https://joduzowulidu.weebly.com/uploads/1/3/4/4/134435513/8035894.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/xupimaral/dead_trigger_2_apk_mod_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sodoxi/vsco_full_pack_apkpure.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3d8d31452f90b7ff7981f/t/5fd684cd267c8d0ace4c849b/1607894224073/gesezavoziwovoda.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd6e2c6d96458361c2338/t/5fc450e3a97599144e820c37/1606701288175/37091525020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db0a82fc-d967-4645-b795-5ffc086b972e/john_macarthur_isaiah_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b97afe-2c45-4f86-a7a2-818ea588d649/78678718105.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1a7b9084698658e639c4c/t/5fc516eff3de5e49b506cb4a/1606751986054/tuvekakapesaj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ba71e9fc3622d52139a6/t/5fc295ae9d79364840e1b515/1606587822634/jovunalibusufuzufivapu.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/love_aaj_kal_twist_video_song.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28f8b40f1034a5cb380cb/t/5fc896b326a3037b433fdc6d/1606981300093/45614132649.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_off0000c824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC824 5172 bytes
SHA-256: 0c7eed1e36bcb2d3aa53b12cd59ae6c2e38db51566953c8a41594b0f76373e1c
font_01_sfnt_off0000d9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A1 10428 bytes
SHA-256: ed7df7c5d75b3eb3b01055f2666295f81c13a3a184350b6ee94720d9e97e1cca

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