Malicious PDF — malware analysis report

Static analysis result for SHA-256 9abefcf164445da2…

MALICIOUS

PDF

76.0 KB Created: 2021-03-02 01:39:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2e1b130945b3afaaf5a8a35570fbd153 SHA-1: d0a27d74f3d2e2f86f8c7171ca33550c3cde90d7 SHA-256: 9abefcf164445da282f7cfc1659d872b4e9b0aa8e1617d85f218b067de04b9f3
186 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 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 0.9996

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.
  • 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://jottigo.ru/123?utm_term=how+to+set+up+a+strength+training+program PDF link annotation
    • https://cdn.sqhk.co/tajiwikiter/bToiehg/train_your_brain_for_success.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382194/normal_603308b4ab8ab.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/4k3ifid/cover_orange_2_level_3-_18.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/T4Z4hjr/nest_software_update_without_wifi.pdfIn PDF document text
    • https://cdn.sqhk.co/kevekelobivo/3XhhZms/wiwome.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/FJpZieE/99002444769.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377109/normal_5fd7c733bc854.pdfIn PDF document text
    • https://jovigazever.weebly.com/uploads/1/3/1/6/131637362/kuvulamul-moraxipoguxal.pdfIn PDF document text
    • https://cdn.sqhk.co/govazofaj/ivgGheC/card_maker_creator_for_crc.pdfIn PDF document text
    • https://gamitodotabezoj.weebly.com/uploads/1/3/1/4/131453651/7773d3c49d530f.pdfIn PDF document text
    • https://wunurobi.weebly.com/uploads/1/3/4/8/134881210/bividebutup.pdfIn PDF document text
    • https://tazerodine.weebly.com/uploads/1/3/4/5/134598813/3993631.pdfIn PDF document text
    • https://toxafowusolele.weebly.com/uploads/1/3/2/8/132815148/valawevuzemivazuv.pdfIn PDF document text
    • https://sezifiloxoxo.weebly.com/uploads/1/3/5/3/135348424/lisoxej-dedine-jexanenulik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449181/normal_5fc7d68e284c1.pdfIn PDF document text
    • https://munemajof.weebly.com/uploads/1/3/2/3/132302982/nadegenuxuv.pdfIn PDF document text
    • https://benipotuwazel.weebly.com/uploads/1/3/4/4/134445242/gimodidejix_nikimolubim.pdfIn PDF document text
    • http://xogubafirugufa.iblogger.org/what_is_the_main_theme_of_catching_fire.pdfIn PDF document text
    • https://cdn.sqhk.co/tusifefovozu/ifhfqib/methode_swot_marketing.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://winavetipi.epizy.com/tri_tronics_sport_basic_g3_not_working.pdfIn PDF document text
    • http://xakafof.rf.gd/79605560373.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_off0000ed5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5D 5256 bytes
SHA-256: dd2d636a0449ab8a4dfe36aa54d9916aa4af46e70054d2afad78b54ff13b0c1f
font_01_sfnt_off0000ff25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF25 10240 bytes
SHA-256: e2dfc895dc2cec0b74c6c1008b06d5f7aa8d6e07efbeffee74356b9097ecc11b

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