Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b98e85f6e822fd…

MALICIOUS

PDF

75.9 KB Created: 2021-04-02 23:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dc391d97497c69a498c181e01ba2a402 SHA-1: 5b8b4295d81b47794ecb0c5c98dcf3a3a2c8de65 SHA-256: a8b98e85f6e822fdfb3e1b63c35c38c9192e890cd7b2910ae6d3f0537d933289
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded links, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure for a "GTA V online PS4 hack tool". The presence of external URIs and the link farm heuristic indicate a phishing or scam attempt, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://golowaki.ru/wix?keyword=gta+v+online+ps4+hack+tool PDF link annotation
    • https://pixadodo.weebly.com/uploads/1/3/2/7/132740612/4445228.pdfIn PDF document text
    • http://nepufikusugepa.iblogger.org/sulasikawel.pdfIn PDF document text
    • https://pimakesoxokozo.weebly.com/uploads/1/3/4/0/134041299/077d62691711.pdfIn PDF document text
    • http://wusejopajaxus.22web.org/eau_guidelines_testicular_cancer_2019.pdfIn PDF document text
    • http://nivanugifur.iblogger.org/5304321601.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7fe1f042-206b-4735-a408-f56337efeeb4.filesusr.com/ugd/d34b51_7d0ab9b66d0449beba79917c3e043707.pdf?index=trueIn PDF document text
    • http://zuzariliwit.rf.gd/propiedades_del_aguacate_hass.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/mukufabon.pdfIn PDF document text
    • http://logovejewuwofe.rf.gd/holy_bible_in_tamil_free.pdfIn PDF document text
    • http://joxekupad.epizy.com/aun_qa_self_assessment_report.pdfIn PDF document text
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_69536f65d0e741bd82556964c36c0de1.pdf?index=trueIn PDF document text
    • http://pexefenebize.epizy.com/zanif.pdfIn PDF document text
    • http://doxikejopem.rf.gd/98982823165.pdfIn PDF document text
    • http://bifajone.rf.gd/65776882506.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/please_answer_me_google.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06c12b0e-777b-47f9-9831-a46bab92339c/jowokiponolili.pdfIn PDF document text
    • http://zafebofegev.epizy.com/250_exerccios_anlise_sinttica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/627e88b4-cf68-4ccd-b681-161cd08f2990/what_is_the_focus_and_purpose_of_educational_psychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebda025d-8246-4c1b-a6b0-01058fa99360/harrisons_principles_of_internal_medicine_20th_edition_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0b506be-0cfc-42e3-8548-27eb7c528d09/how_big_are_miniature_dachshund_puppies.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_off0000ea20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA20 5168 bytes
SHA-256: 6994311514c1d74a530acdde3648d8fb24f94a282b485a5d1a16b1ebbee5373a
font_01_sfnt_off0000fbc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC6 11396 bytes
SHA-256: 2584ae3f1c032f11d23b2ac4488c21b2ceb422d91c89d7ec811a04e72cf6c064

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