Malicious PDF — malware analysis report

Static analysis result for SHA-256 f512dd7cc9e18391…

MALICIOUS

PDF

127.1 KB Created: 2021-03-31 08:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 8b1c023efaf65fe9a51f31e8231fadd3 SHA-1: a4b0a3221f4e9d742b07384d089442d28097286c SHA-256: f512dd7cc9e18391292871a632bd2040e62ba63e484f9dce7d850cb13ffde922
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 0.9991

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://yafferge.ru/wix?keyword=chapter+7+test+form+2a+algebra+1+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4443371/normal_603ee1add03ab.pdfIn PDF document text
    • http://rijemilev.iblogger.org/sales_and_marketing_skills.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393883/normal_6030286bcec45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376874/normal_6021edbe8818c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407793/normal_5ffdd409cf05c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393489/normal_6000496f6d50f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495976/normal_60281026e9d7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506200/normal_605f6cfa518f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502248/normal_6027584a8a8fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485714/normal_60466a65828a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446491/normal_60472d27e42ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451756/normal_5ffb923c8a897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412170/normal_5fd86eb8dad44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lurutopobi/59571852586.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/52451614635.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/89068234015.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/red_gold_wedding_invitation_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/94423780286.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/sugawenevumumotag.pdfIn PDF document text
    • http://vuremekewema.rf.gd/lirewalu.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/brother_hl-2140_laser_printer_driver_free_download.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19677 5572 bytes
SHA-256: 4841fd1e33706fc0a6af0246ed0ecf88feb94f946935e764a0f0ee48c856811f
font_01_sfnt_off0001a967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A967 3164 bytes
SHA-256: 0adb364c7821e182beada9492379166c838cd758f5c72e38686c1bf136504f17
font_02_sfnt_off0001b619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B619 12324 bytes
SHA-256: 0f06295164657d2ea38fc1cf9f9685e10167665feaaf873550b1225d5e11506e
font_03_sfnt_off0001dff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DFF8 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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