Malicious PDF — malware analysis report

Static analysis result for SHA-256 14cae5638e8cf9d8…

MALICIOUS

PDF

70.7 KB Created: 2020-11-19 20:14:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a4a5b7d04955669ed2cb3181e2111293 SHA-1: d5f868000e80f14ee37745a92097c82430cd342d SHA-256: 14cae5638e8cf9d8d45bb1ac08905939ea07da6beb13784dbb5093bc0e37efd0
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a ClickFix paste-and-run lure. 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 0.9998

Heuristics 6

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://trafffe.ru/strik?utm_term=ring+of+elysium+performance+guide PDF link annotation
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/22dbf0f186e32.pdfIn PDF document text
    • https://xabuladuj.weebly.com/uploads/1/3/4/6/134677331/fiwujelifago.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/d585eab8343c0.pdfIn PDF document text
    • https://tulalezosisab.weebly.com/uploads/1/3/4/6/134601470/90d5e07e.pdfIn PDF document text
    • https://buwupejobo.weebly.com/uploads/1/3/4/2/134265589/efa94.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/jopomodilamego/descendentes_2_it_s_goin_down.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/groups_of_dogs_images.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/printrbot_simple_metal_heated_bed_upgrade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1fb6b86-e592-4adb-bcee-7af937f60c9a/mejijerona.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/51531722635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eeb493e-9636-4af8-ba93-0262c620dd6a/xovenimisafotugavulapoxur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d0c4670-326f-49aa-8fea-907ce23d7f00/dilok.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/begimejopujufugosow.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/mosofevonigebop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3e01e39-b4da-41a2-b540-bd2d9af5e460/what_is_fitness_evolution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc57d29d-95eb-40a7-8805-6218bda72ae8/70181363871.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_off0000d6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F2 5584 bytes
SHA-256: 388da9e6dd84b28e9f0061eacb815538c4f6d357c968512d43626b04186e3569
font_01_sfnt_off0000e9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F6 10492 bytes
SHA-256: cbc0e5cdf6936578ab52cc79d366a2281960b3e048634a04b50aab830f550119

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