Malicious PDF — malware analysis report

Static analysis result for SHA-256 7666abe90039c27d…

MALICIOUS

PDF

66.2 KB Created: 2020-12-28 20:38:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2bbff4fdeed863f33ca5b9af1a91d61d SHA-1: 748070ef5726c3311a1b604d9d82b2582a7cb3c4 SHA-256: 7666abe90039c27d607a140df9f72ccb35fe63aee76535cce6b65df4318a86b9
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to educational worksheets.

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://trafffe.ru/aws?utm_term=associative+property+of+addition+worksheets+third+grade PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401983/normal_5f91f372689f6.pdfIn PDF document text
    • https://cdn.sqhk.co/vigesiji/hfrhgiw/kirunulafujavug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485010/normal_5fa7a87fa0db0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/3013052488.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/ccim_registration_ayurveda_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1c1279d-d6d3-4b01-b2cd-c46b0739e4b0/waterford_village_apartments_ma.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/71956390517.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/taurus_9mm_pistols_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/calligraphy_alphabet_font.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/4870337971.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/guide_book_of_united_states_coins.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/xipizegosegakebilizo.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/koruxibigevimavo.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/15917208560.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_off0000c33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC33D 5692 bytes
SHA-256: e2094d6f79090d55eb5daa9525b2556e3042c094bac8c098d257f2b3ea3ca5f5
font_01_sfnt_off0000d6c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C1 10844 bytes
SHA-256: 64f63644abf33faf7bdc8b505550de56e744d245a3d33e3b958a5b3c80d9ba4a

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