Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b3e5642e34ea2ee…

MALICIOUS

PDF

82.2 KB Created: 2021-03-07 13:28:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cab5356d8a3cecff18fa472b495f918e SHA-1: 5958442e32368b66faa011cdd2193ddd6d2c4565 SHA-256: 6b3e5642e34ea2ee86f498cf45932d84910197ae3a864ecb46cdf8050a6bb807
206 Risk Score

Malware Insights

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

The PDF document impersonates iCloud, a critical brand, to lure users into clicking a link that leads to a credential phishing page. The embedded URLs and the ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit user trust for credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://waweviruwupo.weebly.com/uploads/1/3/5/3/135311422/pizaroziri_wiwulorewu_javatedofa_dufanatagutofuz.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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://gimoguvi.ru/strik?utm_term=how+to+make+a+nano+sim+card+fit+into+a+micro PDF link annotation
    • http://wonder-ita.space/82209998465mtwf3.pdfIn PDF document text
    • https://waweviruwupo.weebly.com/uploads/1/3/5/3/135311422/pizaroziri_wiwulorewu_javatedofa_dufanatagutofuz.pdfIn PDF document text
    • http://ductsunlimitedins.com/fanozajedepesejizevasa9w1vh.pdfIn PDF document text
    • https://nonejekorozu.weebly.com/uploads/1/3/4/1/134108542/50642d8f81787bb.pdfIn PDF document text
    • http://kismyketio.com/47003060441fnuqt.pdfIn PDF document text
    • http://sbrf.link/reduced_adverb_clause-effect_clauses_exercisesyobev.pdfIn PDF document text
    • http://cheapestshop.xyz/pigonafawowehvw50.pdfIn PDF document text
    • http://vovpomnim.ru/sekiro_best_ending_guideza8yy.pdfIn PDF document text
    • http://grampus-shop.com/86008912880trbjy.pdfIn PDF document text
    • http://grigolia-studio.ru/invitation_letter_template_formalcgvm5.pdfIn PDF document text
    • http://fbdirect.site/34751748349ufkhb.pdfIn PDF document text
    • http://pro-konditer.com/will_it_snow_in_eugene_oregon2fa6v.pdfIn PDF document text
    • http://fakaripeti.xyz/supuwosugenafjjdcl.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
    • https://s3.amazonaws.com/kawotexulozax/bixufozivaxot.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/sagegas.pdfIn PDF document text
    • https://0e67983c-e844-40c9-b604-97311ec94efe.filesusr.com/ugd/6e13d9_20ab28f6a8454031ac3e01fc7ad73c4e.pdf?index=trueIn PDF document text
    • https://53860ffb-5975-4088-b838-5c82367c2827.filesusr.com/ugd/0d2908_b8005a144d1143668967fdbb2050b956.pdf?index=trueIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_59e56a7c7ae5479695f7c1104ff1fb7d.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62F 5040 bytes
SHA-256: fdcf626adc9cbbcbbe63ba5d4a7a51ddc785dcf3b674156b38e6d754e58193e0
font_01_sfnt_off0001073f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073F 11076 bytes
SHA-256: 85da1d28038e83f6c16ffde06aaf6b61fc2de61b53b5412e35af5da498aca2b1
font_02_sfnt_off00012d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D08 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c