Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a176dffb12a951…

MALICIOUS

PDF

76.8 KB Created: 2021-03-10 06:36:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 6519e69dec947dacf0edb97d52f93435 SHA-1: 818c008ab02ac4a57d3050cae5de8e9cd5bb61a9 SHA-256: 49a176dffb12a951a36ed452122907ca21cd3a910f8f32eba2a2232c8c4823e0
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the primary attack vector appears to be the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lozipotod.ru/award?keyword=list+of+bailable+and+non+bailable+offence+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386829/normal_60074ae9a9a17.pdfIn PDF document text
    • http://wdd13.ru/canada._ca_ei_internet_reporting_loginqixod.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/tezifopidulopizasilab.pdfIn PDF document text
    • https://gewopisoxow.weebly.com/uploads/1/3/4/3/134306678/6a465bc0c8e234.pdfIn PDF document text
    • http://babblescoop.store/26301605734cqoo9.pdfIn PDF document text
    • https://pamaxorakumi.weebly.com/uploads/1/3/4/0/134019068/mederadepen_donugetenotar_wosozufukewi_tikiburogavam.pdfIn PDF document text
    • http://inscarusa.info/nakolaxodagow2jkq6.pdfIn PDF document text
    • https://jokinurelebuvet.weebly.com/uploads/1/3/1/8/131856462/4305309.pdfIn PDF document text
    • https://juwaxevepatasi.weebly.com/uploads/1/3/0/8/130874094/fasasoxinupu.pdfIn PDF document text
    • https://zerasogamonan.weebly.com/uploads/1/3/0/7/130775055/rozinomusapex.pdfIn PDF document text
    • http://keepmaxi.space/desufedujijafoweviwzc6g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494877/normal_60196b224a849.pdfIn PDF document text
    • https://veminimuvaw.weebly.com/uploads/1/3/4/6/134630651/6329903.pdfIn PDF document text
    • https://judelewufajog.weebly.com/uploads/1/3/4/5/134516313/metekivupubok_porotekegodovo_xetowot.pdfIn PDF document text
    • https://sidugavumudoriz.weebly.com/uploads/1/3/4/9/134902227/dalosolaged-baputegolif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407994/normal_5ff795a0de720.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/free_barbara_cartland_novels.pdfIn PDF document text
    • http://sberbank.services/857776072263gpbd.pdfIn PDF document text
    • https://wiraxupafetob.weebly.com/uploads/1/3/2/6/132696263/mixaw-dopekivobe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_76481bd99e984231a68f8c6a22c6f452.pdf?index=trueIn PDF document text
    • https://22520ec4-2132-45a5-98b8-54db1b71d3ea.filesusr.com/ugd/b33b96_1f24c43af6214815acbd816721592a5a.pdf?index=trueIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_4f38f08a7ac34dc6abb21a7107bef2a6.pdf?index=trueIn PDF document text
    • https://c4bedd8b-a3e9-4aa8-9751-a6fde4035b7e.filesusr.com/ugd/037f08_b4b9c725a35b46e589b994bd818624f0.pdf?index=trueIn PDF document text
    • https://rb.gy/1lorfyIn 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_off0000f202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF202 5136 bytes
SHA-256: c414c65864b8f1cd96f9c9098f7c4c6b92814254ed916b07dccea0f2ac0cd76c
font_01_sfnt_off0001038c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038C 9864 bytes
SHA-256: 8b94313325c6cb9c18fd00410e064fe0109d38720ac7949287087b51b5bcac81