Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd32b7461a920218…

MALICIOUS

PDF

72.7 KB Created: 2020-11-14 11:23:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2c17885e5ee43a173079f60dab895efe SHA-1: d9af3eb3ccbfc9eadc39f5ed5d7004ceb7fe1e3d SHA-256: dd32b7461a9202181f46f550c4c2f3cc193048e1b6977199bcc5e92dfc0fcd01
176 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. It uses a QR-code 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 0.9997

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://traffset.ru/aws?utm_term=root+android+sin+pc+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420902/normal_5f9f6e6f52ce4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445340/normal_5f9fceaa2dcb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377678/normal_5fa0e6c802dc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503214/normal_5faf43cfadeff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423728/normal_5f9f55778eaca.pdfIn PDF document text
    • https://totobulamu.weebly.com/uploads/1/3/4/3/134310137/666a26.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/xuzed/zivegulabebanepaxasuwugux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5dfb6b0-f76f-483c-a162-a4600ee909f0/25656371658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56da34c0-cff6-4de0-8677-e0d59ed19857/69603898665.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/zepagijerurugux.pdfIn PDF document text
    • https://s3.amazonaws.com/rekibedafowow/jozenisoxik.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/servizio_informazioni_aeroporto_di_catania.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_off0000df24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF24 5524 bytes
SHA-256: 84936f4f9a092d30eaa57bdc594b73bdb1f274e38c0c2ec7b48346a8b06dd2d7
font_01_sfnt_off0000f1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FD 10728 bytes
SHA-256: 448522e65357ffafb4e535dcc3ac202d8390d6dd6219ba5df975ea7fdc7669ed

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