Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba6a08e1a423d368…

MALICIOUS

PDF

78.2 KB Created: 2021-05-14 23:18:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9c68db7a6fe60fd8b4dd5810e5116dbd SHA-1: 46801825bb51b7ff74ce27c34a674e31061fcf7d SHA-256: ba6a08e1a423d36883a2bd3ac88c09a7f4df8100bfd1225aeaa04bff6b19f674
244 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to disposable hosting or redirectors, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests the primary goal is to redirect the user to potentially harmful content.

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/strik?utm_term=pelicula+el+se%25C3%25B1or+de+las+moscas+analisis+psicologico In PDF document text
    • https://jawuvufos.weebly.com/uploads/1/3/4/8/134856807/tokawiposowubu.pdfIn PDF document text
    • https://cdn.sqhk.co/dozirerom/hcifjeW/s_photo_editor_collage_maker_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/raninogozo/ijhbXje/ualberta_library_hours.pdfIn PDF document text
    • https://cdn.sqhk.co/bepifopid/1K1hi9K/tedisazuvojezi.pdfIn PDF document text
    • https://cdn.sqhk.co/rarirawibowo/0hjjb8w/raditibibafu.pdfIn PDF document text
    • https://wozogerodinanu.weebly.com/uploads/1/3/4/4/134498855/2522069.pdfIn PDF document text
    • https://fufigejopugip.weebly.com/uploads/1/3/1/0/131070204/907669.pdfIn PDF document text
    • https://kenitavujene.weebly.com/uploads/1/3/5/9/135977886/tixevevori_vufigozax_zixuz_garidatujanebuk.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/7KK6jqI/simple_no_bake_desserts_recipes.pdfIn PDF document text
    • https://cdn.sqhk.co/rutisifelom/hdicHhi/email_templates_for_sales_and_marketing.pdfIn PDF document text
    • http://rorabuvarumezip.22web.org/cholecystitis_in_pregnancy.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/gjmKRaj/wallpaper_4k_ultra_hd_games_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dewavasese/hgf2mhg/woodbridge_apartments_wylie_tx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bidilud.rf.gd/83751821955.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/openly_straight.pdfIn PDF document text
    • http://banobozibijur.epizy.com/the_top_five_regrets_of_the_dying.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/jalokonunavunawuwiv.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/sepufebivakifogemugimam.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/georgia_drivers_license_manual_2020.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_off0000ef2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2A 5608 bytes
SHA-256: 9ff0ebba27f3caf8ba857b02812fb535eed2dc33f0b81ca64ae4548399357b67
font_01_sfnt_off000101df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DF 12212 bytes
SHA-256: 50ca5da75c5dce539c17db62e4038d91dbf67c29c31238550d74ac35804e8076

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