Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b00309e9badf1c8…

MALICIOUS

PDF

70.6 KB Created: 2021-02-22 00:09:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 391ae17da7feb0525f9069df7d53b1d6 SHA-1: 89e1711ab46133450af8bbf421e78d1aea8e8ea5 SHA-256: 0b00309e9badf1c8ed7c6be122bd396d1ed167b1d39347624e3b3cf0b76e15b8
186 Risk Score

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 0.9998

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://bologen.ru/123?utm_term=osi+model+layers+protocols+pdf PDF link annotation
    • https://domafotenok.weebly.com/uploads/1/3/5/9/135973376/ronazama.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/1ZkIxjb/alienware_laptop_battery_price.pdfIn PDF document text
    • https://xozisimoxu.weebly.com/uploads/1/3/1/1/131164350/1494136.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/hgHheYD/cbse_class_9_social_science_ncert_solutions.pdfIn PDF document text
    • https://rasajelisulozin.weebly.com/uploads/1/3/1/6/131637016/4201295.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovipawe/hjg4Uhi/instant_pot_hard_boiled_eggs_time_chart.pdfIn PDF document text
    • https://likudone.weebly.com/uploads/1/3/4/6/134681098/7cb1ccea740a713.pdfIn PDF document text
    • http://pubgmobiie.com/borubodasewogogerobobel8dvnb.pdfIn PDF document text
    • http://shtancircul.site/a_lesson_before_dying_chapter_16_analysisftw73.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/lelunaluv_pizijapa_ximadepa.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvexudid/c4fhbsR/lidowiwipusezilo.pdfIn PDF document text
    • http://vovpomnim.ru/zipizulaxubuz1p3t.pdfIn PDF document text
    • http://idealicaitalia-official.site/metric_space_book_downloadr98k6.pdfIn PDF document text
    • http://gk-kuban.ru/50202895157vbf9g.pdfIn PDF document text
    • https://cdn.sqhk.co/vunelebu/bjbgeqi/wings_game_cinemaware.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E4 5432 bytes
SHA-256: 8af81062d217babc61e7920eef5240382653319ee697e36227d89e6b75683181
font_01_sfnt_off0000e94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94A 10804 bytes
SHA-256: fc7e46c2aa5b7b4a8738968992d74d5b981563d241c9a9e7e0117200d6d6178c

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