Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a661106385bcf9…

MALICIOUS

PDF

72.1 KB Created: 2020-12-27 22:49:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cdfc7ff5547c05e7e0ed165d0c2305ce SHA-1: b92fb15b8ed070852d5375b5b497f808f1513268 SHA-256: 14a661106385bcf99298fe1b3c3027263dfd638b774e2bfb7710055dbb2a8683
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?utm_term=how+to+play+dominoes+rdr2+all+fives'. This URL is likely used to redirect the user to a phishing page or download a malicious payload. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing and redirection intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/strik?utm_term=how+to+play+dominoes+rdr2+all+fives In 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/d4aa1af2-5186-4060-8f6f-11ea9e8234f5/26795683297.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/wow_horde_leveling_guide_1-_100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f3522a6-dea3-4a96-a5c4-cb3b77b247df/secret_societies_and_psychological_w.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40f9d5c9-9626-487e-9476-0eae7a47b927/pofijowagelumeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47e37812-4c92-4fe7-bada-b4ee73e9bfa8/death_worm_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac22a48c-0f4c-465d-a489-cea4f1c0300a/kakasabos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6fa818c-7cb2-40f8-9587-001fa87bcbf2/labenelinitamowulewinoxiw.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/dancing_on_my_own_sheet_music_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/commutative_property_multiplication_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/001b81ac-61cb-4d3f-b971-de60d9587518/25855943678.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5c6f873-3b26-4060-be28-6faf8dd3338d/how_to_download_a_minecraft_texture_pack_1.14.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e3e75d8-a779-4d52-a85c-baf6412e644c/hydraulic_pump_design_calculation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75b3b1c9-c73d-431b-8636-527de179a123/toy_story_personajes_nombres.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_off0000ddae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAE 5536 bytes
SHA-256: 56d25734875bcbf4148261edd279686a0bd11788754830c6a30f7dbef64d1f97
font_01_sfnt_off0000f087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF087 10300 bytes
SHA-256: 46051028ff578ab1ef5cea51f07846654843c963eb1bba3b664207a24ccef396

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