Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa038f9f1b618fd…

MALICIOUS

PDF

68.5 KB Created: 2021-03-16 20:23:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 95709d289bffb9f9ef02c75fe12a67ef SHA-1: 57c63e297705e808505089906f6b8f2c2497517f SHA-256: 6fa038f9f1b618fdbbaf798092080dd1ec4589355ca2471c18d677148ebc47f7
186 Risk Score

Malware Insights

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

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 0.9991

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.
  • 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://leonvi.ru/123?utm_term=ventilador+atvio+manual PDF link annotation
    • http://papotupeti.iblogger.org/android_fragmenttransaction_show.pdfIn PDF document text
    • http://wajazenizur.mywebcommunity.org/ruvewapezixiliz.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/geiibij/t_i_fall_guys_mobile_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/iCmTjjz/20507350199.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/vjcBVje/ghost_killer_entertainment_wikipedia.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.website/maximum_principal_stress_formula6vtng.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/BCigZhc/italian_musical_term_for_brisk_lively_manner.pdfIn PDF document text
    • http://storezone.info/946191976717yxty.pdfIn PDF document text
    • http://draiwenstore.online/baby_shower_invitations_registry_information_etiquette9pasa.pdfIn PDF document text
    • https://xoxazibazosilex.weebly.com/uploads/1/3/4/5/134590820/1393561.pdfIn PDF document text
    • http://reduslim-sito.site/19988967890sz5d8.pdfIn PDF document text
    • http://knitfqph.site/198714304963to8m.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosira/njb9ggc/jarepulorovopasijowaxifos.pdfIn PDF document text
    • https://cdn.sqhk.co/morexemodoju/a6Pdhhs/82335012917.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwuzuwix/cPv1PmV/jogimowif.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/ngf4Ah3/zefogilotizamemofumowe.pdfIn PDF document text
    • https://cdn.sqhk.co/wekajibex/iEsUKXs/unanswerable_questions_synonym.pdfIn PDF document text
    • http://gaxenop.medianewsonline.com/21105043088.pdfIn PDF document text
    • https://zorisurirumu.weebly.com/uploads/1/3/4/6/134600588/7085031.pdfIn PDF document text
    • http://morasuxod.getenjoyment.net/bomokofizujemufojorowudus.pdfIn PDF document text
    • https://cdn.sqhk.co/satasevubu/fFhcbZj/ketakawe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pixagikaw.epizy.com/countable_and_uncountable_nouns_worksheets.pdfIn PDF document text
    • http://kodexizorivixi.rf.gd/maytag_bravos_xl_washer_user_manual.pdfIn PDF document text
    • http://wexereza.rf.gd/jinedukavupokukonuzo.pdfIn PDF document text
    • http://junorijuzijipu.rf.gd/96243086681.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_off0000cdc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC4 4820 bytes
SHA-256: 100543533882f9108db8c3d156ba4b352fb7e3aba4514fe57f33f6af24822ea7
font_01_sfnt_off0000de15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE15 11140 bytes
SHA-256: da76ced9c18ea135984017262ee0c5dccaeaf76f60382269249071436023513e

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