Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb358f67e8eaa0e4…

MALICIOUS

PDF

60.9 KB Created: 2020-12-19 11:19:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3806a31c933404d63f4ca5bd8718ea51 SHA-1: 93bb2d1df510e5b16f3d163c2f483b1c729ee3fb SHA-256: bb358f67e8eaa0e4631297bbfcd025c10126d792366680af213d7d536db3e12c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffi.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to 'chapter 9 circular motion practice problems answers', suggesting a social engineering tactic to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffi.ru/aws?utm_term=chapter+9+circular+motion+practice+problems+answers PDF link annotation
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/9277405.pdfIn PDF document text
    • https://kajumosezu.weebly.com/uploads/1/3/4/7/134749214/satob.pdfIn PDF document text
    • https://vuwapelenepaje.weebly.com/uploads/1/3/4/7/134705438/80d81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485457/normal_5fa973395df8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372355/normal_5f928258ab8f6.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/babuxufarizuxur/que_paso_ayer_2_descargar.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc576008ef7301f8b2fc014/t/5fc7bb30c953717e09e3f2f5/1606925105874/fifa_soccer_game_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5ac88ff13940aa260242e/t/5fce223e3ff10115401a4db0/1607344704867/legend_of_the_phoenix_wiki_game.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc07dde27a199023ab34438/t/5fc1cf303485235c86098499/1606537009526/kh_re_chain_of_memories_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/88222535592.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/zimeviborodaserexupazoj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfcd6f403f5353fd8f68b6/t/5fc2dfde1972c46e3cfd744a/1606606815701/thing_explainer_online.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/brain_teasers_puzzles_in_job_interviews.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51ca1bd14ff0dd2b7ddca/t/5fd052d648ae4d1218fe3aa9/1607488214984/las_vegas_national_golf_course_jobs.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9EA 5468 bytes
SHA-256: 27ba65764f447da8f71d202229ff5371340904c1e89dd20c9c1f8c8a9bb1a943
font_01_sfnt_off0000bc66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC66 8188 bytes
SHA-256: 6311c96a566c7be80e5c9a3134a29c8c6a29c77e119648be8a980766926ea57f
font_02_sfnt_off0000d84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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