Malicious PDF — malware analysis report

Static analysis result for SHA-256 2087601a9406afc1…

MALICIOUS

PDF

98.5 KB Created: 2020-12-17 23:07:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a4d6cec7e52448e96e3f3d5ea29fc082 SHA-1: 08c08a9c48187789d3813b308429442c850927bc SHA-256: 2087601a9406afc1dff63f872ce8c81c8b93392879c6dd2b2436d056f947af2f
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://trafficel.ru/123?utm_term=virgin+hair+fertilizer+oil', which is likely a phishing or scam lure. The document body, though heavily obfuscated, contains text related to 'Virgin hair fertilizer oil', suggesting a deceptive pretext for the malicious link. No scripts were extracted, but the presence of an external URI in a malicious PDF strongly suggests an attempt to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=virgin+hair+fertilizer+oil PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4529095/normal_5fc0354543865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380213/normal_5f99bf381fdcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406777/normal_5f9abbebab4ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405193/normal_5fd6779e18aa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405946/normal_5f98cbbd788a6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/276095e4-22bf-4053-9f56-4c4455728bf8/organizational_behavior_and_management_11th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/70140066234.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/beach_formal_dresses_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc188b1c89e1c4b8fc2eaf8/t/5fc89804d32d012678fdbf35/1606981636861/photo_collage_program_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/arya_samaj_books_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acb62589-a761-4a21-9992-03e71dbf12cd/7162888323.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/baar_baar_din_ye_aaye_song_ming.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00015134.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15134 25008 bytes
SHA-256: af42dd9a2ae4cb17c90e9d7a8f6e2f0030cf4579c34a57ff6f2090a4bc8213cf
font_00_sfnt_off00011ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE6 4864 bytes
SHA-256: b0828ca8c5d1ce68a3e2018fe6235804da1aa9a666fd81d9d5f6bc569fe5db44
font_01_sfnt_off00012b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B82 11036 bytes
SHA-256: ce1b9e752e93fa61bbb807597614184ce7900f7f8a1de92adaf39edcdc03aa2e

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