Malicious PDF — malware analysis report

Static analysis result for SHA-256 9155fce1340037a3…

MALICIOUS

PDF

77.8 KB Created: 2021-02-22 15:29:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 86eaea69ad6e19a963b6d1fddf34c50c SHA-1: 118a7c1c4cce3b6f26bc1d6d981b9fdbdea713da SHA-256: 9155fce1340037a3f66510416ce5c7940bf8df6b7c07f51180a4951ae2637d15
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/strik?utm_term=breville+smart+oven+pro+prices PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367941/normal_5fcdc251edb78.pdfIn PDF document text
    • https://pewituzusab.weebly.com/uploads/1/3/0/8/130874049/suris_xevozoruwi_mizeretopepu.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/hjjdhgz/one_gun_2_stickman_mod_apk.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/essential_mathematics_for_economics_and_business_teresa_bradley_download9uwz7.pdfIn PDF document text
    • https://cdn.sqhk.co/seworani/gxhicij/16267396334.pdfIn PDF document text
    • https://cdn.sqhk.co/tememagitapo/p92gdE3/52100336934.pdfIn PDF document text
    • http://dmdmassage.com/metric_conversion_worksheet_high_schooli6x3g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471081/normal_5fe8783abbdb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371005/normal_5fe2d2c142415.pdfIn PDF document text
    • https://sixixufur.weebly.com/uploads/1/3/2/3/132303163/5811416.pdfIn PDF document text
    • https://pimidunobesuxig.weebly.com/uploads/1/3/0/9/130970022/kenag.pdfIn PDF document text
    • http://helpcontactform.com/honeyguide_bird_information_in_marathi5120t.pdfIn PDF document text
    • https://tariwina.weebly.com/uploads/1/3/0/7/130739483/76ec94bc24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423715/normal_60174e1a257cc.pdfIn PDF document text
    • http://solent.bar/can_you_print_with_only_black_ink_cartridge_hpcmril.pdfIn PDF document text
    • http://rikedodiveli.22web.org/96586417102.pdfIn PDF document text
    • https://cdn.sqhk.co/notizejamebo/fihgw0g/57634104075.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/dedinavesute/avery_label_template_5160_for_mac.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_off0000f252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF252 5188 bytes
SHA-256: ff61b8d020b1e27f8c5ef462fdafb9339ab001fdc9738f8bceb835762f1feff4
font_01_sfnt_off000103e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E7 11232 bytes
SHA-256: 7254a9fc2fb0e6b713f4b17620e01ee3aae4af33fe3931a0adfee81fbf1f8b91

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