Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa1f307440e8c6c…

MALICIOUS

PDF

86.6 KB Created: 2021-02-25 23:46:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: be864b9b8f1f0d79636101b6df1a75ae SHA-1: 445902da7a7266575cb81fb0ab170f1b1d6833e8 SHA-256: 5fa1f307440e8c6cd7f3d5a855c966d64eca4b3983db441d58e133e1d3f84e36
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs with SEO-like titles, suggesting a link farm or content-spinning operation. One prominent URL, 'https://seumenha.ru/wix?keyword=a+course+of+love+mari+perron+pdf', appears to be a lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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 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.
  • 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/wix?keyword=a+course+of+love+mari+perron+pdf PDF link annotation
    • https://lobakazuperowe.weebly.com/uploads/1/3/4/3/134352895/rimex.pdfIn PDF document text
    • https://naluzakagowu.weebly.com/uploads/1/3/1/4/131411806/puwepuva_semaxoxaje_suriwibuginan_giwisefuno.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/lgcLiih/new_tomb_raider_movie_cast.pdfIn PDF document text
    • https://kupowenip.weebly.com/uploads/1/3/4/0/134042521/luvidiwujeneruma.pdfIn PDF document text
    • http://kurs1.xyz/insurgent_movie_freei0em5.pdfIn PDF document text
    • http://rewita.fun/sony_bdp-s590_lockedllhue.pdfIn PDF document text
    • https://depesusexufajev.weebly.com/uploads/1/3/5/3/135351117/61aa8e6db0ccffc.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/BNbnaii/wevepolaxa.pdfIn PDF document text
    • http://alteramaks.world/lajenoruny6cdz.pdfIn PDF document text
    • http://itawegan.fun/nonukepunitudoxekosh8c50.pdfIn PDF document text
    • https://sefusozikoju.weebly.com/uploads/1/3/4/3/134366316/9198117.pdfIn PDF document text
    • https://batezumepew.weebly.com/uploads/1/3/4/4/134479003/38b3b3c97ec5202.pdfIn PDF document text
    • http://lyudi23.ru/jekiwemofirogabesirttdn.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/zatazewoz/maths_homework_answers_online.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/cal_osha_flammable_cabinet_requirements.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/16899526846.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/dazip.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/lomogikaliputusu.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_off0001188e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188E 5352 bytes
SHA-256: 82595ee3b34171a1f415931e22b173fa3cbeac35f42172537f0787186c270811
font_01_sfnt_off00012ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB2 10164 bytes
SHA-256: 7396a958419f0f7d652a775639b0a68ef289577bd7d9ad90aab720d893dffaae

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