Malicious PDF — malware analysis report

Static analysis result for SHA-256 552662ab76dfd9dc…

MALICIOUS

PDF

67.9 KB Created: 2020-11-22 03:00:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 4937323762440593feef84fee81c06db SHA-1: def48fa7c67d0f104b734d69d7dd677936c02432 SHA-256: 552662ab76dfd9dc1b7d70ff08db4b2c93fb5920415b7d3862e1eb612f7ec00b
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/aws?utm_term=app+backup+whatsapp+android+para+iphone In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420476/normal_5fb587ef84832.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378606/normal_5f946f8d82b20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414339/normal_5fb4368670c39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5f8bf35653723.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405185/normal_5fab0ac025e8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383791/normal_5fb3cbd07f832.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489583/normal_5fb41b5e14009.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/tesodagiwor/la_foule_paroles_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/433339b8-f77e-4f11-b2a6-ed692c8dc477/liluxitiwitifewe.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/14484282674.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43350f9f-bc62-409f-a3cb-028b2ec4200e/star_wars_force_unleashed_2_cheats_xbox_360.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/purowu.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/giwole.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_off0000cc45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC45 5416 bytes
SHA-256: 878ae5486b9ec9ea1fcfb9a0d3a901d2251c029fafc1a8ec3772ba1b412f1a51
font_01_sfnt_off0000deb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB7 10588 bytes
SHA-256: c0f8c9fdead52f25d10a989bc90641579c9a9ee8a1fe1ddd5688a338befd540d

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