Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e8694235a9bcabe…

MALICIOUS

PDF

76.1 KB Created: 2021-02-20 17:57:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0bb9600543158ebcf95dfeb1c5e1205c SHA-1: a3ad7936aa0d77b85cbd471c10a456f64c7c9e5e SHA-256: 8e8694235a9bcabee03810dea197a31a10499ebfbfd82165b47102930dfe029a
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable domains and redirector infrastructure, indicating a link farm designed to distribute malware or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs, such as 'https://yafferge.ru/wix?keyword=closest+self-serve+car+wash+near+me', are likely part of a campaign to lure victims to malicious sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=closest+self-serve+car+wash+near+me In PDF document text
    • https://wusedutewaxugag.weebly.com/uploads/1/3/1/4/131437839/87ca9e1d1a4.pdfIn PDF document text
    • http://9gusevshop.space/atar_notes_biology_20193gtkl.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/Gge4gcK/xotiduresefuvifowideniki.pdfIn PDF document text
    • http://winfreeiphone.xyz/tv_channel_logo_quiz_answersarcui.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/ia4ze2y/magic_words_hey_crossword_clue.pdfIn PDF document text
    • http://mmmuuuue.space/wibaxajabexijaxokibekaw9697.pdfIn PDF document text
    • https://tunomofezu.weebly.com/uploads/1/3/2/3/132303147/sepabu.pdfIn PDF document text
    • http://topvideo.design/gips_compliant_performance_calculationgf834.pdfIn PDF document text
    • http://beautysss.site/procedimiento_de_administracion_de_medicamentos_por_via_parenteralv43gh.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/cUhedxc/vurixefuzalilej.pdfIn PDF document text
    • http://vengriya.space/song_aishiteru_banzai3ynj1.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/ljicOia/fevepukukofetozozig.pdfIn PDF document text
    • http://fastgetme.online/8531094836hcmlp.pdfIn PDF document text
    • https://zefipoxiba.weebly.com/uploads/1/3/2/6/132681281/zeropejenubov.pdfIn PDF document text
    • https://vumifedesonuzik.weebly.com/uploads/1/3/4/8/134849268/6495944.pdfIn PDF document text
    • https://cdn.sqhk.co/vojazodelud/ig3ibEl/rolling_stone_magazine_subscription_4_per_year.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/fekaduvopigab/newsday_crossword_puzzle_answers_today.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_off0000ee04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE04 5212 bytes
SHA-256: eb1701eac2dfbb518196deba17a82af8f284f714e1a6d24a6ebd8b44be76089e
font_01_sfnt_off0000ffb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB0 10572 bytes
SHA-256: 840502a7956acbbb43b1cb4a3cd81ad3408540e4f69473636e2096e1070e5762

Open this report in the interactive analyzer, or submit your own file for analysis.