Malicious PDF — malware analysis report

Static analysis result for SHA-256 37edc30ee162ddda…

MALICIOUS

PDF

71.3 KB Created: 2020-12-04 14:53:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c5480544a9e2ddac600124d2851c4d52 SHA-1: 932986a5482ad0935e2fa52e00b54392cb9d5c51 SHA-256: 37edc30ee162dddac144976e701a6668f7373298d04322816776cd5db5ee100a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it contains a large number of external links, characteristic of a link farm or phishing lure. The document body, though heavily obfuscated, suggests a theme related to 'Technology of the gods pdf'. The presence of external URIs and a PDF link farm heuristic strongly suggests an attempt to redirect users to potentially malicious websites.

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://trafficel.ru/strik?utm_term=technology+of+the+gods+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449781/normal_5fb034b9d45be.pdfIn PDF document text
    • https://rofexelugikovu.weebly.com/uploads/1/3/4/7/134732340/1869884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371498/normal_5f9ea5c751b5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418381/normal_5fc54b3ee9796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407781/normal_5fad735237de0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421058/normal_5fb7631c1507c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369640/normal_5f956d8d2f847.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412775/normal_5f9a37d34a6d0.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/zirojopemup/foruzefosekawipibak.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/ninunimumesamolov.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/7477469899.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/kijibumoveditaginimogum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b494596-58f0-4efd-9ee7-088327ef7d97/steel_deck_institute_design_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69d36bb0-06dc-41a8-a8c1-53f4ac167f47/kujen.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_off0000db05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB05 5160 bytes
SHA-256: 9954db0142139b735ce0ceeea40b9a7b0a27f3597d01264ede2f2d1f3ce7f593
font_01_sfnt_off0000ecab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAB 10816 bytes
SHA-256: f77d0ec9079a8fd537c0580b22836cdb8c355f5863deb2e5691b359024c7942f

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