Malicious PDF — malware analysis report

Static analysis result for SHA-256 a288cd1349428ca8…

MALICIOUS

PDF

74.6 KB Created: 2021-06-13 23:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b47b6469a6d85e9ce48dbbbe67d2a412 SHA-1: cc1a7f40863fd6676a4a6aa080a8f47da90580e8 SHA-256: a288cd1349428ca8354c30e589b89c0ec3b7dd8033219f7634e7b2647d69a33a
246 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing attempt. It contains multiple external links, many pointing to disposable hosting, and one specific URL is identified as a brand-impersonation credential phishing lure. The document body, though heavily obfuscated, appears to contain keywords related to software downloads, reinforcing the phishing pretext.

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://xogudefimo.weebly.com/uploads/1/3/0/7/130775634/aff65772f1990.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://allytemp.ru/pbw?utm_term=hotstar+premium+mod+apk PDF link annotation
    • https://xogudefimo.weebly.com/uploads/1/3/0/7/130775634/aff65772f1990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401505/normal_602ae169acd4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505326/normal_603bde335b287.pdfIn PDF document text
    • https://rifezapolufopit.weebly.com/uploads/1/3/5/3/135316727/zobilemasimigokuso.pdfIn PDF document text
    • https://fajuvupo.weebly.com/uploads/1/3/5/3/135310445/dudogejufijabiju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465691/normal_6044cb1eb932f.pdfIn PDF document text
    • https://nutovavodus.weebly.com/uploads/1/3/4/0/134012609/129895.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421778/normal_5fcdc2f150ffa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371814/normal_602dae2c5e154.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377112/normal_6044def35090d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496216/normal_606ccb612b57b.pdfIn PDF document text
    • https://xexetuva.weebly.com/uploads/1/3/4/5/134599875/veregabiludilodatin.pdfIn PDF document text
    • https://mozufutedubido.weebly.com/uploads/1/3/4/5/134503110/dawezisawigidil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492272/normal_5fd2dbfbf260a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382421/normal_600a1ab99cf18.pdfIn PDF document text
    • https://nododekevage.weebly.com/uploads/1/3/4/7/134733794/0ce8d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479226/normal_60082a8032901.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zufumegi.pbworks.com/w/file/fetch/144790620/duvefilizajupu.pdfIn PDF document text
    • http://suzojadek.pbworks.com/f/systems_of_linear_equations_substitution.pdfIn PDF document text
    • http://jujirafamena.pbworks.com/f/24539430092.pdfIn PDF document text
    • http://sujagajo.pbworks.com/f/jerixoxagepunanojubi.pdfIn PDF document text
    • http://nukisefel.pbworks.com/w/file/fetch/145242165/hack_keyboard_apk.pdfIn PDF document text
    • http://nanefumipopo.pbworks.com/f/21894302527.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/w/file/fetch/144443007/what_does_the_bible_say_about_respecting_other_religions.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_off0000e7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C8 5096 bytes
SHA-256: d71395619bc6ff80a468c6e109e8d0c3444188c557ca0b142b0fcd408a47484d
font_01_sfnt_off0000f905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF905 10504 bytes
SHA-256: 5090a9a095dafdf5ffd41439180d0acc2a68f6b66411472ae26d196464d36be1