Malicious PDF — malware analysis report

Static analysis result for SHA-256 fff1af7cd679e7c9…

MALICIOUS

PDF

104.0 KB Created: 2021-05-04 12:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 071d388c2a97c3a45f8f5636736754ef SHA-1: 74cf414dd3384853123e091d60d26a1f4e183d95 SHA-256: fff1af7cd679e7c92fcc9fab06d46ecaf7388cb46fa15c580f2d279ac6f4eb12
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that, when clicked, directs the user to a suspicious domain, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to contain metadata related to job search terms, suggesting a lure to trick users into visiting the malicious link.

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://leonvi.ru/strik?utm_term=electrical+engineering+jobs+entry+level PDF link annotation
    • https://cdn.sqhk.co/wezufunin/jeFiiv6/nisenajowoxaperofum.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/hfWihFo/new_fifa_laws_of_the_game_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/biihdjd/12390675674.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474456/normal_6023e37a67989.pdfIn PDF document text
    • https://cdn.sqhk.co/sabumijobude/Iruhftk/28445940129.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414871/normal_601786dcdbdd3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451217/normal_5ff3935443718.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/fhhiija/r_word_images_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nojebimit/ctNYJgf/fruit_pop_candy.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovusig/igji6hb/62533327854.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/higdgis/68233740383.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://uploads.strikinglycdn.com/files/f0dd6a0c-0f41-413d-8629-a89d6531124b/taxepejowis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31021d70-38cc-4fe2-a2e3-ea8b1102d898/vututifuvukunizaterunizes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f495b0a6-f033-4880-b919-fcb609df84de/does_beachbody_work_without_shakeology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59938571-c08d-4d9d-844c-c807b0ff3f95/69036100291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49ea22fe-a41e-4034-ae47-dbf23f020813/kosodaratamobitinanoda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a148678-307f-4c75-a60f-3adc012b7519/30065946088.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_off000147f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147F4 5092 bytes
SHA-256: cd7a02cafe766b992b07fbf1b73eb646e160bc113fc858403343c99a0512c680
font_01_sfnt_off00015956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15956 12076 bytes
SHA-256: 337f3333925a7113c11b15977183d64fda8b036013b71459bd46d25c2f62b1bc
font_02_sfnt_off00018249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18249 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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