Malicious PDF — malware analysis report

Static analysis result for SHA-256 3013ad53277eb9cf…

MALICIOUS

PDF

86.0 KB Created: 2021-05-18 08:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0f2de627e3ff631b2c03a2b4e185cc2b SHA-1: f8b74a49e27c240b1925fff9a064f4302eb1f611 SHA-256: 3013ad53277eb9cfa57b8096ea4fcad3f23ebcb918ab22a7af2a4b0238e30c3e
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these external links. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://baarspo.ru/strik?utm_term=increase+ringer+volume+iphone+xs+max PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417040/normal_60635e2ed37ee.pdfIn PDF document text
    • https://radifepibonavu.weebly.com/uploads/1/3/2/7/132712096/0fcfec.pdfIn PDF document text
    • https://texifafotolatip.weebly.com/uploads/1/3/4/7/134764930/jogor_kaxopojema_zegajuwivaved_tixibevo.pdfIn PDF document text
    • https://fuzewejobedogu.weebly.com/uploads/1/3/1/4/131482867/wewiboji-miwutesawu-naxepanano.pdfIn PDF document text
    • https://fanamavikere.weebly.com/uploads/1/3/4/6/134610997/tudefu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418991/normal_6058ef7b6892a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409619/normal_5fc601c73a768.pdfIn PDF document text
    • https://tatidadimu.weebly.com/uploads/1/3/5/3/135383915/padowu-bomeze-wokakirudelu.pdfIn PDF document text
    • https://saxenivimagi.weebly.com/uploads/1/3/0/8/130813604/gimefurej-tajukifez-xosunudorekisid-ponuvunenavi.pdfIn PDF document text
    • https://vitigamonewus.weebly.com/uploads/1/3/1/4/131406732/xemotironojelosebufe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469119/normal_605bf14731b86.pdfIn PDF document text
    • https://xapefawisago.weebly.com/uploads/1/3/4/7/134771693/waxodarazamu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417806/normal_605f6afde3ca5.pdfIn PDF document text
    • https://bobixazila.weebly.com/uploads/1/3/4/5/134599816/noxikizega.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412895/normal_60234cfd82462.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486975/normal_600731d5f116a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_6061f3054e08f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_60639eac99143.pdfIn PDF document text
    • https://komamezumef.weebly.com/uploads/1/3/1/3/131398541/bupigutifa_wuxurim_tegufopipipox_nelori.pdfIn PDF document text
    • https://lirefabagobaxi.weebly.com/uploads/1/3/4/0/134012393/jorasiwekigefu-mezibapi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485693/normal_60032919d6da1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fariwugakek.rf.gd/15001296698.pdfIn PDF document text
    • http://rukapanaped.epizy.com/foxfi_key_hack_apk.pdfIn PDF document text
    • http://gugujis.epizy.com/93318438200.pdfIn PDF document text
    • http://wegepuzil.epizy.com/arduino_pro_mini_atmega328_datasheet.pdfIn PDF document text
    • http://rapozafetod.epizy.com/antigen_presenting_cells.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10592 5212 bytes
SHA-256: 54f4eee17c93cc74a44215aa2ab648d26316bd69a17322b009203dcd5f943000
font_01_sfnt_off00011716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11716 10840 bytes
SHA-256: 0e96e2234080cb580674def81a80c091161d2811f631572bb2032affb1b963a2
font_02_sfnt_off00013c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C0D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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