Malicious PDF — malware analysis report

Static analysis result for SHA-256 edad3f1282239f3f…

MALICIOUS

PDF

69.9 KB Created: 2021-02-18 13:43:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f5fb29e51bb0cb95a1bcc26518138d69 SHA-1: dcfc8d976a3b59d92f682206dccd4f2b5bba77ae SHA-256: edad3f1282239f3f61ebe474c085e81d334b0461babf7bf81e81a4bc6879d55b
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=acca+sbr+exam+date+march+2020 PDF link annotation
    • http://zeretula.iblogger.org/andromax_tools_v1._8.pdfIn PDF document text
    • https://cdn.sqhk.co/temisexezoda/iahiiqC/lomebiwosekegelumapovez.pdfIn PDF document text
    • http://sexugaweguko.iblogger.org/ket_exam_listening_answer_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/mewixamok/CjgZge0/sejeduvu.pdfIn PDF document text
    • http://1yamal.space/2683960723u1zlb.pdfIn PDF document text
    • https://cdn.sqhk.co/gapekozuwa/gdigigj/49577298569.pdfIn PDF document text
    • https://cdn.sqhk.co/laxefotogulo/jhayZid/razezor.pdfIn PDF document text
    • https://cdn.sqhk.co/woselukafo/jbiigi8/raxorirevavu.pdfIn PDF document text
    • http://javebamugizal.66ghz.com/71426781954.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/qhbhdid/paralogimuzazedebes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dokedajonanumi.rf.gd/xajevufedasine.pdfIn PDF document text
    • http://fafamusefene.rf.gd/darobomizezelulibojokebej.pdfIn PDF document text
    • http://lamekukibudinos.epizy.com/boxagijuxu.pdfIn PDF document text
    • http://vatezajis.rf.gd/fokek.pdfIn PDF document text
    • http://zamoguwudegovo.rf.gd/python_module_windows.pdfIn PDF document text
    • http://votepawawirinu.rf.gd/72682188509.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_off0000d061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD061 5616 bytes
SHA-256: 5efc208d96a100bd6aedcec5592dd1bbc645a9c8a2d145590a1c7ad815344494
font_01_sfnt_off0000e34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34E 12636 bytes
SHA-256: 7265fcfe4ff65aec1a9353330ba52b00af7276168f5bc9724e2e0bb5725a0ba4

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