Malicious PDF — malware analysis report

Static analysis result for SHA-256 82fe4beca3f135b1…

MALICIOUS

PDF

68.7 KB Created: 2020-11-20 15:31:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 39bc35102fc488f5f1ae33795bceda82 SHA-1: d893fccd61fa649e87e8838f523cf19ba601a379 SHA-256: 82fe4beca3f135b15da226ffc3af8937a9c606f3de5c927198743a70a7ed64e7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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/123?utm_term=white+jewelry+armoire+with+lock PDF link annotation
    • https://rarasaxemog.weebly.com/uploads/1/3/4/6/134611000/45e9cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5fae8472c839d.pdfIn PDF document text
    • https://sixodajumam.weebly.com/uploads/1/3/4/3/134311071/vavaxi-kefidinizujetip-vorilowi.pdfIn PDF document text
    • https://silemixijotin.weebly.com/uploads/1/3/4/4/134463531/dolejo_fevoriraber_wafozazixe.pdfIn PDF document text
    • https://ruvazokof.weebly.com/uploads/1/3/4/0/134040659/8292564.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446382/normal_5fa1e7118de95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420030/normal_5fa548c81bd7e.pdfIn PDF document text
    • https://kepelawurolunuz.weebly.com/uploads/1/3/4/0/134017158/zexotosebawamoxuji.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/dojonuta/ribudovawigizisokaxigo.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/wesekomemagokavarutexodup.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/14432045636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21b92604-5ec2-4b8f-afb4-c10d8d4c8d3f/christ_the_healer.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/zudurulezukuwupamosa.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_off0000cfca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCA 5208 bytes
SHA-256: bf238a74a9c6e6606725fb0a0c446529de7e9ae513f2884ed0f1e858c3cf1e5c
font_01_sfnt_off0000e175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE175 10852 bytes
SHA-256: 6e0e7d378330f54ea472c2373dc8e8c43e0e99f09c9f3c8ad6df558744a2203f

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