Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3562bb07acc5870…

MALICIOUS

PDF

74.6 KB Created: 2021-04-15 17:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a0aa9574680bf5c30a299c4375ae2d0a SHA-1: 309973ed45addb5a46daba717d8ba7afd98d0205 SHA-256: a3562bb07acc5870dec5f44163432d425e7a9046a920a77712155b14d5722f0f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure related to stimulus checks and bank statements, combined with a large number of external links, indicating a phishing or SEO poisoning attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely involving redirection to a malicious site like 'fokemale.ru' or 'ketaton.mywebcommunity.org'. No scripts were extracted, but the PDF structure and heuristics point towards exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://fokemale.ru/strik?utm_term=how+will+stimulus+check+show+on+bank+statement PDF link annotation
    • http://ketaton.mywebcommunity.org/davov.pdfIn PDF document text
    • https://niforobufuxir.weebly.com/uploads/1/3/4/5/134512868/1c8e5c112a32.pdfIn PDF document text
    • https://dajexuxeguse.weebly.com/uploads/1/3/4/8/134859846/ripob.pdfIn PDF document text
    • https://jedifubebevaze.weebly.com/uploads/1/3/4/8/134873515/fidasafu_wurok_barabeteg_vakonudal.pdfIn PDF document text
    • https://tenanetudoji.weebly.com/uploads/1/3/4/2/134266315/vemisuzomudimur.pdfIn PDF document text
    • https://vumopofusub.weebly.com/uploads/1/3/0/8/130874587/batuwadojalu-muwozarub-bexizadagojo.pdfIn PDF document text
    • http://pedaxofanor.mywebcommunity.org/zakaguvumitabijoru.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/muredokokaw_kugoduranewa_berov.pdfIn PDF document text
    • https://gupamawuma.weebly.com/uploads/1/3/4/6/134602371/dd531da1.pdfIn PDF document text
    • https://vojoritus.weebly.com/uploads/1/3/1/1/131164067/1723928.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/gotenukevepunin/vetodebijotoxaj.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/a_gentleman_full_movie_300mb.pdfIn PDF document text
    • http://telusomabufa.onlinewebshop.net/difference_between_fundamental_analysis_and_technical_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/xenipixaragofivatekexalo.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/fapasopevoliletebupod.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/zepotugu.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/what_city_is_the_navy_base_in_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/mammut_runbold_guide_hs_jacket_review.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/fitchburg_police_department_accident_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/54676380393.pdfIn PDF document text
    • http://roveramo.atwebpages.com/atomic_number_and_mass_number_table.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/aircrack-_ng_wordlist_wpa2.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_off0000e3f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F0 5200 bytes
SHA-256: a97c011bd49cab07be7c0a7871c2aa81281025d679c8310994ec227e07499d3c
font_01_sfnt_off0000f58b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58B 11036 bytes
SHA-256: 1d419195ee9b06d9f1a9d7bca516f4edc320d4124cc2796b957166f14f009b86

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