Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd783d44574e64ab…

MALICIOUS

PDF

77.0 KB Created: 2021-02-13 17:39:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: e26fc5b5f7117c6ffd341669c6eb4be0 SHA-1: 7561261197863cbdb057fbb206c8514920752108 SHA-256: fd783d44574e64ab65d9bc8b9d90dedfe52909e42192694cbd370a911c7ed824
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The document body, though heavily obfuscated, contains references to 'American government exam study guide' and is associated with an external URI pointing to a URL that also mentions 'american government exam study guide'. This suggests a phishing or social engineering lure. No scripts were extracted, but the PDF structure itself likely contains embedded malicious content or links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wix?keyword=american+government+exam+study+guide PDF link annotation
    • https://bufudelazevel.weebly.com/uploads/1/3/4/7/134734798/4281907.pdfIn PDF document text
    • https://cdn.sqhk.co/lululitoj/v9ieidt/microsoft_planner_tutorial_espanol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495262/normal_5fe2ab9071deb.pdfIn PDF document text
    • https://xevogivuzu.weebly.com/uploads/1/3/5/3/135350373/dakorafe_lesogitejogaw_lolazisen.pdfIn PDF document text
    • https://cdn.sqhk.co/kenujowemi/g2Zjjvt/word_crush_level_461.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_60245b23c99e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393044/normal_602207d24e743.pdfIn PDF document text
    • https://cdn.sqhk.co/lunajevon/hb4gihc/29455119471.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/r6Dztjf/mermaid_princess_games_y8.pdfIn PDF document text
    • https://fojomuku.weebly.com/uploads/1/3/4/4/134447263/bogowelor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://galukovo.epizy.com/banjo_movie_song_djmaza.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/abdome_agudo_vascular.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/14108123759.pdfIn PDF document text
    • http://jegowijuvu.epizy.com/65920649488.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/63965178576.pdfIn PDF document text
    • http://zozezad.epizy.com/cisa_study_guide_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/67962433289.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_off0000f0fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FC 5448 bytes
SHA-256: 197e3db6bcff5dc90905b5d0fe12bb78ff724a995495c84d2dadbd196fce5c38
font_01_sfnt_off0001037a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037A 10240 bytes
SHA-256: c3cf720ec53cd34c2b760282625b1a9e245350ee3431c39d17ae613e8add81c2

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