Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa22004e8779c99…

MALICIOUS

PDF

77.7 KB Created: 2021-03-20 16:02:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 1f2cda6b557009a4b0a7d4d254f4654f SHA-1: 18abef0326c223b11a0e28299ecc736f3dd86d35 SHA-256: 2fa22004e8779c993ba216c1c5fcdf356b25ea1e755be4c812767bf0755308e5
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or redirection scheme. The primary URL, https://vilenefex.ru/wix?keyword=malibu+boat+guide+pads, appears to be part of this network, potentially serving as a lure or a gateway to further malicious content.

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.
  • 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://vilenefex.ru/wix?keyword=malibu+boat+guide+pads PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389353/normal_602ae4e9a9cc8.pdfIn PDF document text
    • https://cdn.sqhk.co/razanifuwuz/i1MFpgh/wajumegatixon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451377/normal_603556da80d13.pdfIn PDF document text
    • https://katalajoguv.weebly.com/uploads/1/3/2/7/132740778/zakomufoludi-molujajoze.pdfIn PDF document text
    • https://cdn.sqhk.co/dagosasojo/Tvjvhge/14317253894.pdfIn PDF document text
    • https://cdn.sqhk.co/fibafape/jc1jghb/cdg_disc_player_free.pdfIn PDF document text
    • https://zuseluxutiv.weebly.com/uploads/1/3/4/6/134686448/geleva.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/lbEf34H/baraka_da_prince_moyo_umekataa_video.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408002/normal_600e4093294bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383801/normal_60126dba2891a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387701/normal_602826f099d92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393901/normal_604d1daeadc16.pdfIn PDF document text
    • https://cdn.sqhk.co/naxupowu/gchbhfo/53215886086.pdfIn PDF document text
    • https://jobeluke.weebly.com/uploads/1/3/5/3/135318189/tibufo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480393/normal_6049c3d5dbebf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xasezujagabef.epizy.com/zusutanumafetega.pdfIn PDF document text
    • http://rebukupomapet.rf.gd/11161805071.pdfIn PDF document text
    • http://gunebudapuko.epizy.com/lizan.pdfIn PDF document text
    • http://medojowibapij.epizy.com/bombay_film_song_ringtone.pdfIn PDF document text
    • http://vitijumixanuzit.epizy.com/sky_map_northern_hemisphere_summer.pdfIn PDF document text
    • http://tasopawak.rf.gd/how_much_does_it_cost_to_replace_a_printhead.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_off0000f133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF133 5176 bytes
SHA-256: 07214eb4a9fc27d327cbac5fe47f35405453d5d29c6f3d8b0ddd593975c723ad
font_01_sfnt_off000102e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E6 11300 bytes
SHA-256: 5aa11dac7ba91da790aa2a7f1b0c2d0aacb651ceaa145ea0c3a8724aad70de86

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