Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6c9cf76c10925d…

MALICIOUS

PDF

77.7 KB Created: 2021-03-15 01:34:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: fca75b8ff061e9b2a942cee751b05857 SHA-1: 5f4d6e423460babf688f714c51418b7277d7e8cf SHA-256: 5e6c9cf76c10925d0d4fc64a029ec6fcc07eab046b9eb876a3a2bede6dad9e6e
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, with numerous external links pointing to various domains, many of which are hosted on disposable or suspicious platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/123?utm_term=herbalism+wow+professions+guide PDF link annotation
    • https://cdn.sqhk.co/fizuborugas/jhbXhfC/scientific_socialism_simple_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/javomekoru/hggZPRy/philadelphia_flyers_promotional_schedule_2019-_20.pdfIn PDF document text
    • https://kokujefep.weebly.com/uploads/1/3/1/4/131409677/60d8c7f1bd6eb15.pdfIn PDF document text
    • http://digitalliteracyinstitute.com/53128067929cqtb4.pdfIn PDF document text
    • https://waruzakelejabu.weebly.com/uploads/1/3/4/6/134600446/dipitituf-zureso-vusigido-zizasuvevodefom.pdfIn PDF document text
    • https://pawiwojofidinof.weebly.com/uploads/1/3/4/4/134458390/5464637.pdfIn PDF document text
    • https://cdn.sqhk.co/zegareguw/eKOsJij/amazing_maize_maze_promo_code.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/jagjifH/turbo_dismount_2_online.pdfIn PDF document text
    • https://fuborevotoxuto.weebly.com/uploads/1/3/4/0/134017795/gowafezixetufofap.pdfIn PDF document text
    • https://nufawufaza.weebly.com/uploads/1/3/0/7/130740177/perebiz-meliko.pdfIn PDF document text
    • http://ilkertr.shop/48899172648sn4ae.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/gjbCzM2/file_manager_pro_android_tv.pdfIn PDF document text
    • http://mmuuue.space/91737061484ayhor.pdfIn PDF document text
    • https://nugiwilog.weebly.com/uploads/1/3/1/3/131384260/1cd4a83bde51.pdfIn PDF document text
    • https://sorasewemo.weebly.com/uploads/1/3/4/3/134358680/3991075.pdfIn PDF document text
    • http://reduslimitalia-official.website/6_pack_beer_holder_templatetvp50.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/32jicXC/stickman_fight_online_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/ihbhhsq/vepiwilamajizunebeludix.pdfIn PDF document text
    • https://lakafirawitekir.weebly.com/uploads/1/3/4/0/134018328/0b62f.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/JgdhbsO/firinixunufamozepidel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_39b992d252a547feaebf33c96f986e5e.pdf?index=trueIn PDF document text
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_84ddf47ce5e64ceca377f249e02cd4fd.pdf?index=trueIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_1000176480e049d78492039d9a4050c2.pdf?index=trueIn 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_off0000f3d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D1 5552 bytes
SHA-256: 950d5f1ba20af1da1983b7c18de865e94240cf8b9de66624ea774933db15518e
font_01_sfnt_off000106a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A9 10212 bytes
SHA-256: 2a9934c1d437496a56a8e944f0e7211fa05ef95deec0539d626d5ef6c11f4191