Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f329cfbae1e281…

MALICIOUS

PDF

95.7 KB Created: 2021-04-05 02:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bdad88ad78bd07ed9718c91720511192 SHA-1: da866456bad1b0b8c5d10f140677312dfadc1689 SHA-256: 60f329cfbae1e281c978498b385942fa5b7c48af4c9f74bf42803104cbee0815
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 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=crusader+of+light+guide+indonesia PDF link annotation
    • https://cdn.sqhk.co/jasurisunav/sRFghjg/zamevopan.pdfIn PDF document text
    • https://cdn.sqhk.co/kasavakujosi/YiuR0ii/56688008327.pdfIn PDF document text
    • https://cdn.sqhk.co/komagiju/bjjcFJX/tiduzopojasudikobobuvawuz.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/a1eViZ1/41030382844.pdfIn PDF document text
    • https://radutarogo.weebly.com/uploads/1/3/4/3/134379411/lexixojivepodag_nijidaki_zodus_vekivuta.pdfIn PDF document text
    • https://liberiloro.weebly.com/uploads/1/3/4/5/134589576/4846598.pdfIn PDF document text
    • https://jefaganogebe.weebly.com/uploads/1/3/1/4/131437435/3101071.pdfIn PDF document text
    • https://cdn.sqhk.co/xelajuwodaf/gNzjd2a/wonosopura.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/Urnjjid/6764212330.pdfIn PDF document text
    • https://wixuzezokanozav.weebly.com/uploads/1/3/4/6/134663812/wadiporefojorul.pdfIn PDF document text
    • https://cdn.sqhk.co/jawefujivi/dVQgfZv/19186482900.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/heih1jj/82886933322.pdfIn PDF document text
    • https://pegigisujojefuf.weebly.com/uploads/1/3/1/4/131413718/4152764.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mevusajilitum.rf.gd/rate_of_diffusion_of_gases_lab_report.pdfIn PDF document text
    • http://saninov.epizy.com/hemiballismus_treatment.pdfIn PDF document text
    • http://losaleludaguxes.rf.gd/kisomaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df17373c-0afc-4e34-805e-56cf3fce12f6/64129621571.pdfIn PDF document text
    • https://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_b4b6aeda1c9d494da53354b4cd72366c.pdf?index=trueIn PDF document text
    • https://b73db3ac-2e3c-475a-83ab-7f4668f00a8f.filesusr.com/ugd/80e8fa_2682d2798b874da1a3cb8f3b5d6f561e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd985ab5-ed8a-48c4-8bae-4e8f2e376e3b/xurifigogomofaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4dbabf4-ed51-4e97-84af-ab7ddc72418f/world_of_warcraft_chronicle_volume_2_portugues.pdfIn PDF document text
    • https://e924225a-aa46-4bfc-8e56-7341551e1833.filesusr.com/ugd/54dfea_d74f607fe23142149521a15fffed6cea.pdf?index=trueIn PDF document text
    • http://wekaniloba.rf.gd/ajith_hits_songs_masstamilan.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_off0001388b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1388B 5072 bytes
SHA-256: 207a341144f9c42ad1c9bb187d76e1d2ec034172c4e4026c53302c7047b3cffc
font_01_sfnt_off000149bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149BF 11760 bytes
SHA-256: 22e5b0934846276b651ab102311966d429a02bdc8703bdcace1095c0c795c4fa