Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1309e59f800480d…

MALICIOUS

PDF

88.8 KB Created: 2021-01-24 11:27:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 696248fe24ec2876f6e79aad916755f1 SHA-1: 23620b53c07f6924ff647296fb64b8005ddcad0d SHA-256: d1309e59f800480d6e2534ad6a60dc6ea5b23ec83efa0c830cd86a2ef3265980
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to 'baarspo.ru', suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious content. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' further support the conclusion that this document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://baarspo.ru/123?utm_term=mutant+guide+atf PDF link annotation
    • http://remont-pc.website/fiwege890je.pdfIn PDF document text
    • http://osthondroz.com/flip_jump_stack_apk272lc.pdfIn PDF document text
    • https://teligodinawam.weebly.com/uploads/1/3/4/4/134457670/2147663.pdfIn PDF document text
    • http://smeh-mif.space/40138353063dexbf.pdfIn PDF document text
    • https://gidutuzewefira.weebly.com/uploads/1/3/1/3/131380066/zojovumex.pdfIn PDF document text
    • http://milanomoda-italy.site/79613640768uwodx.pdfIn PDF document text
    • https://febapemideb.weebly.com/uploads/1/3/0/7/130738739/zalemoditiwow.pdfIn PDF document text
    • http://svoydvalend.xyz/temple_run_2_game_play_app_downloado7on0.pdfIn PDF document text
    • http://myyshooop227.site/7867689388jabt7.pdfIn PDF document text
    • http://zinuvudoliku.iblogger.org/zenofutivinizexejaguxavo.pdfIn PDF document text
    • http://repochka.site/two_smoking_barrels_castkzgtf.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/pegozegi/95812895935.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/charmy_black_clover_true_form.pdfIn PDF document text
    • http://kirutitas.epizy.com/auditing_standards_summary.pdfIn PDF document text
    • http://menasore.epizy.com/enthought_canopy_python_2._7.pdfIn PDF document text
    • http://vujulazi.epizy.com/american_pain_society_guidelines_fibromyalgia.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/4710254147.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/57446852924.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/coding_interview_questions_python.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/vetowatew.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_off000121d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D3 4776 bytes
SHA-256: 260bb607baa34037e62bcbc23bface4bb4493471c7a39a99aa6d74f363b32bc1
font_01_sfnt_off00013239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13239 10432 bytes
SHA-256: a2a09004661ad16139fa9ff6bd38c8c2c4f88d038fcc18e937237db2dedcee14

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