Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a9d450b11b2b4b…

MALICIOUS

PDF

78.4 KB Created: 2021-02-27 15:08:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fb9443dd043cc6815021e124cde0399e SHA-1: c495d24a72a8449d786db7170d2281bcf37acc23 SHA-256: e6a9d450b11b2b4b130cf37e7c9411213de73fb81526dc188896a8d9911b283a
166 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, with heuristics indicating a payment redirection lure. The document contains numerous external URIs and is structured as a link farm, suggesting an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and the nature of the heuristics strongly suggest it exploits a vulnerability to execute code or redirect the user, aligning with a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://druttle.ru/wb?keyword=what%20are%20the%207%20characters%20of%20life PDF link annotation
    • http://kaxiwemusemoj.mypressonline.com/what_period_is_called_the_age_of_reason.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383574/normal_60111f3090731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447253/normal_5fd3705d96a41.pdfIn PDF document text
    • http://nupesupo.mypressonline.com/what_period_was_sherlock_holmes_set_in.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454430/normal_5fefd8ef23651.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494140/normal_5fe3ab4597cd1.pdfIn PDF document text
    • http://betawajapasex.22web.org/tokudupafomumoluresa.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/jufaxama.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5fd6376c14050.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/adidas_apple_watch_band_38mm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391893/normal_5fecc9e8ba6dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410983/normal_5fd7c9e495b86.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/que_significa_el_dibujo_topografico.pdfIn PDF document text
    • http://gipilunafa.iblogger.org/xuwipojogusimizine.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471513/normal_5ff66a04aac6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419441/normal_5fed0fe3cae74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mapegolirij.epizy.com/invitation_template_birthday_girl.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/synonyms_worksheet_for_grade_3.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/1984_wellcraft_owners_manual.pdfIn PDF document text
    • http://lununobasafino.rf.gd/calendar_invite_meeting_template.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_off0000f357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF357 5064 bytes
SHA-256: 898d9bd587dbdadc2196e64a31c3da3802ae6f4e124ad27e0deade7bd4a41894
font_01_sfnt_off0001049e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049E 11208 bytes
SHA-256: e7f9abe973cc98dbf57877cf0cda1da35b358b0328f1b8925d6096c103830ff7

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