Malicious PDF — malware analysis report

Static analysis result for SHA-256 434cf2f98cb30927…

MALICIOUS

PDF

81.9 KB Created: 2021-03-23 04:27:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 448a0eca5054073ff9e3897a2c5b22aa SHA-1: 59b1d88be28a968f0dc9e099fcb7e9ea055bbcf3 SHA-256: 434cf2f98cb30927a2188420e7f93c3589eb87e5718a616f46f98fcaaa3bcf19
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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 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://crophysi.ru/strik?utm_term=can+you+kill+an+elephant+with+a+gun PDF link annotation
    • https://kapokifi.weebly.com/uploads/1/3/4/5/134510442/kexez.pdfIn PDF document text
    • http://br1.red/37921237798e6y2k.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/what_does_black_ribbon_symbolize.pdfIn PDF document text
    • http://bratskpravojur.ru/which_excerpt_is_a_counterclaim_in_what_to_the_slave_is_the_fourth_of_july_quizlet1271t.pdfIn PDF document text
    • http://indir-kazan.com/love_quotes_stickers_for_whatsapp_iphonebzsa5.pdfIn PDF document text
    • http://misstourist.info/kusizerafakazezizoxw1cem.pdfIn PDF document text
    • https://cdn.sqhk.co/wewuxujudu/fjggjhb/vintage_gold_snake_belt.pdfIn PDF document text
    • http://meblik.su/72122423971j03qs.pdfIn PDF document text
    • http://serarudipiwuvon.mypressonline.com/57062208708.pdfIn PDF document text
    • http://bigchance.pw/prescriptive_vs_descriptive_grammaro6cqb.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/jbsjJhi/little_misfortune_demo.pdfIn PDF document text
    • https://diwekivoveludu.weebly.com/uploads/1/3/5/3/135313391/4415615.pdfIn PDF document text
    • http://naturwow.space/90306570792iut03.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/discrete_mathematical_structures_4th_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/jusulikipe/iaXBgfG/75004612674.pdfIn PDF document text
    • http://okrasote.info/60628721109vsk0.pdfIn PDF document text
    • http://luchdobro.site/magic_mouse_2_space_grey_reviewwjvyc.pdfIn PDF document text
    • https://taxesewisozigif.weebly.com/uploads/1/3/5/3/135394589/leditiginowebiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nukilaba.myartsonline.com/73304382887.pdfIn PDF document text
    • http://bujekotu.atwebpages.com/28566471561.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42C 4968 bytes
SHA-256: d9c1cffca139c46cd725ff6fceed9fda556205ddf2e565dcdfcb0d1a1e068b00
font_01_sfnt_off00010538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10538 11440 bytes
SHA-256: b9e4426afdcdb6c4b50d2e729428e0566906ad95194a12926c7aa67298a321cf
font_02_sfnt_off00012c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C59 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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