Malicious PDF — malware analysis report

Static analysis result for SHA-256 71be24587b24575d…

MALICIOUS

PDF

84.2 KB Created: 2021-03-11 14:52:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a26c376a1a2e7d4fbb3b17b53052c2b1 SHA-1: 11800b364725eda067870a968173384de6cc02aa SHA-256: 71be24587b24575d7e83be4dd87db584bc8526d7b4f15b45d1e1f33f3d7ac992
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=book+best+self+be+you+only+better+pdf PDF link annotation
    • http://lianhua.life/26660848029l12wc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490138/normal_60271e004a5a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_6038914d71974.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413578/normal_5ff57bbe81511.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383137/normal_6026e1aeb7e0b.pdfIn PDF document text
    • http://letxxnx.org/hachiman_god_complex3d9ri.pdfIn PDF document text
    • http://rent-nout.site/reason_for_leaving_on_job_application_form4tnz5.pdfIn PDF document text
    • http://edevletorg.com/postcards_from_the_edge_carrie_fisherpjhgb.pdfIn PDF document text
    • http://psychologyrelax.xyz/21838769076mx6h6.pdfIn PDF document text
    • http://daimontimur.org/64453240746zzrjr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409122/normal_5ff9449ee5d52.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ef8fca3-63a2-4a24-af08-7a62dd3b4940/samsung_q7f_65_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be520a78-6e6c-4232-9812-accf54b1ae4e/how_to_replace_transmission_solenoid_2002_ford_explorer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e91060a-e767-4311-893e-fc9acde9b2ee/zarumemuparezabodoba.pdfIn PDF document text
    • http://gumigojozupe.epizy.com/3392109591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/322f9ee4-9ea1-4582-9070-e3a65a7b74d9/how_to_file_illinois_state_taxes_late.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0ffaeb6-ccd9-44fe-98a6-9fc3796048cd/ruwavo.pdfIn PDF document text
    • http://fujeximadotut.rf.gd/filmora_news_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a974c8e6-59a7-4867-a1cd-19a552ebbf95/22904811326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07fe346e-a372-4bdc-bf40-38e55c887946/how_to_calculate_dividends_for_common_stock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/958094b5-f938-4864-85ad-5ac1c778f5a9/92908879482.pdfIn PDF document text
    • http://dipijiz.epizy.com/miritutiperazonejijin.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_off00010e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E35 5180 bytes
SHA-256: c0e87fbeda36b79cae80259e40613abd1544e6635e94ef1f086e987aba4c9205
font_01_sfnt_off00011fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEC 10308 bytes
SHA-256: c3c820808468f590732201b75a8169492ab5ba39f7020384bf5ee595fe273fbb

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