Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c50a4ea4a165523…

MALICIOUS

PDF

62.7 KB Created: 2020-11-13 03:46:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 60a3c32836233192030cb8fd6ceaea1f SHA-1: ba3bcf7b377c42df2753938c67c8437144fe0428 SHA-256: 5c50a4ea4a165523099213b49b86843eb990193fa6d16190b970ebbef3724938
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating it's a malicious redirector link farm. The primary malicious URL identified is 'https://traffmen.ru/123?utm_term=scp+682+death+reddit', which is likely used to redirect users to further malicious content. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffmen.ru/123?utm_term=scp+682+death+reddit In PDF document text
    • https://gujidasudaximuv.weebly.com/uploads/1/3/4/3/134384457/bosadatux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f8b58827c1a9.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/5088566.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420602/normal_5f965d521b6ac.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/8635db20514c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485308/normal_5fadcc09df22e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417530/normal_5fa5e0e7bb917.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/b686f10b-eac0-4131-9dda-41c042351f70/40117468267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20a91f0b-91bf-4e83-ab30-d5c0f1166762/nosododigitafugitig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4b8db7d-72fc-45f7-bb9e-5be16e0a95cd/tc_electronic_flashback_2_delay_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20847429-95d5-415d-b218-6dbe8b552770/68530893311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/575240fa-56b8-4a42-9f06-cc75b226b8b2/who_developed_roblox_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a7bd1c3-04b1-4503-8745-4d765e023fc2/63215386729.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_off0000ae79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE79 5104 bytes
SHA-256: 46941da8fc942490bb0d2653f2a2951d1cbd195e23cb63639bfc256b0b462c12
font_01_sfnt_off0000bfd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD6 9416 bytes
SHA-256: 13ad7e9799dc0b5c616629d85920523b0234aa972d26f3bdaf6a1fd4546db969
font_02_sfnt_off0000e01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.