Malicious PDF — malware analysis report

Static analysis result for SHA-256 8658ed4a6eabacdc…

MALICIOUS

PDF

74.0 KB Created: 2021-03-18 17:58:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 2efdb867ad65d65ddd28a59443d6b378 SHA-1: 41bf28d1ebfaa9012d9c47288ceb9a7bad85c92c SHA-256: 8658ed4a6eabacdca58b551c058372e412fa946266f864ec5efc3f7a881be127
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier. It impersonates Amazon to lure users into clicking a link that leads to a link farm, likely for credential phishing. The PDF contains numerous external links, many hosted on disposable domains, indicating a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://dakubazelup.weebly.com/uploads/1/3/1/4/131454222/dupeji.pdf.
  • 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/wix?keyword=1984+book+2+chapter+7+study+guide+answers PDF link annotation
    • https://dakubazelup.weebly.com/uploads/1/3/1/4/131454222/dupeji.pdfIn PDF document text
    • https://sulagumafiwez.weebly.com/uploads/1/3/1/3/131383207/tugusukuje.pdfIn PDF document text
    • https://rofupujo.weebly.com/uploads/1/3/4/3/134335987/senowezubaw_disigofaj_mixivopawomeb.pdfIn PDF document text
    • https://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/333433.pdfIn PDF document text
    • https://tesegape.weebly.com/uploads/1/3/5/3/135387632/fuvusutavaka-lexojomov-malatono.pdfIn PDF document text
    • https://tevadurut.weebly.com/uploads/1/3/2/6/132682826/c2cfb64e2a.pdfIn PDF document text
    • https://xazulifego.weebly.com/uploads/1/3/4/7/134727283/bozojabafofolopopi.pdfIn PDF document text
    • https://kobokudebixisog.weebly.com/uploads/1/3/5/3/135390699/7679982.pdfIn PDF document text
    • http://prizinsta24.site/646964432682bnqe.pdfIn PDF document text
    • https://towelekuw.weebly.com/uploads/1/3/1/4/131406253/tiwumixezefa.pdfIn PDF document text
    • https://japosazononugad.weebly.com/uploads/1/3/4/5/134583509/tudateton.pdfIn PDF document text
    • https://gofazawadatefit.weebly.com/uploads/1/3/5/3/135349405/c2469292b7a9.pdfIn PDF document text
    • https://gixorinimomavam.weebly.com/uploads/1/3/2/6/132695995/monuzamidud_fitalosabes.pdfIn PDF document text
    • http://fenellalucynelle.info/78478258840d0l95.pdfIn PDF document text
    • https://labifunuvi.weebly.com/uploads/1/3/4/8/134847398/8533374.pdfIn PDF document text
    • https://rejaduwewuwuga.weebly.com/uploads/1/3/1/8/131856140/dasudaz-jisulowak-lufoduwa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a49aa754-465e-4bbd-924e-b3d0e7b66bd4.filesusr.com/ugd/81d6a4_6985eaba36104b5b94a13eb88cd077ff.pdf?index=trueIn PDF document text
    • https://69868269-04aa-4a0d-8379-1371762fd556.filesusr.com/ugd/d8beff_416df1fbc7a7427b80e709f9874030fd.pdf?index=trueIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_fdb153c9d24f476d8a1a5703f6ef3057.pdf?index=trueIn PDF document text
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_f73119730168417f8294a64353233626.pdf?index=trueIn PDF document text
    • https://18e99e0c-7034-4a8c-9069-267580a295b8.filesusr.com/ugd/b337f5_6c18f884aea84264804247175aa06da5.pdf?index=trueIn PDF document text
    • https://90ff81fc-98d9-4e53-96a3-aaa5c1c2042e.filesusr.com/ugd/bb5aff_9b1dac6331b84c16ae9716d514adcbd3.pdf?index=trueIn PDF document text
    • https://c8019651-2137-4367-b38e-775fff3f8a75.filesusr.com/ugd/fc5a02_ca738993807d4ccaacf31042ed02855c.pdf?index=trueIn PDF document text
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_d71c1df73970498c9b70211564538cf7.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_off0000e12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12E 6308 bytes
SHA-256: df3ecd0521bd2d392bf77df8e6b4bcbadd1126c4039f40bb5ddc46e883664941
font_01_sfnt_off0000f6bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BB 10316 bytes
SHA-256: f8ecb1843bf0adadaac8d168460000c831b734b438e7ca2106d19009c3586f80

Open this report in the interactive analyzer, or submit your own file for analysis.