Malicious PDF — malware analysis report

Static analysis result for SHA-256 5749fb3a4e3ab38c…

MALICIOUS

PDF

63.7 KB Created: 2020-11-26 01:50:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dcc8909cef96590ba7e128fab75545f SHA-1: 1c3076b1fae8ee99fafeb114c25d1fe2d457f4bf SHA-256: 5749fb3a4e3ab38c8f22c346cb394492aab8c2d5078c0ac4451b25a8f94cbff0
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure and a link farm. The embedded URLs suggest an attempt to lure users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/123?utm_term=trusting+god+day+by+day+joyce+meyer+pdf
    • https://wubawujol.weebly.com/uploads/1/3/4/2/134266052/5835194.pdf
    • https://bososafevibusup.weebly.com/uploads/1/3/4/0/134041518/2679441.pdf
    • https://rokumetusemep.weebly.com/uploads/1/3/4/3/134382705/7272810.pdf
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/5200784.pdf
    • https://cdn-cms.f-static.net/uploads/4410190/normal_5fbc43c897500.pdf
    • https://cdn-cms.f-static.net/uploads/4420468/normal_5fa4bedc6c857.pdf
    • https://dewasujule.weebly.com/uploads/1/3/4/3/134340999/nekejusago_dodig_wapem_roxejep.pdf
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/1073556.pdf
    • https://lanedipeluta.weebly.com/uploads/1/3/4/6/134666686/fizow.pdf
    • https://tejaxoxujita.weebly.com/uploads/1/3/4/3/134368030/68f3eed9.pdf
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/nabitejuzoseza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ef4cbf61-9b23-4dd3-a1aa-26dcf84ec19b/zorulonakogokesejimowedu.pdf
    • https://uploads.strikinglycdn.com/files/ca295c5a-1450-4b21-ba36-a6cb15bec8df/89937266552.pdf
    • https://uploads.strikinglycdn.com/files/f6dad8d2-1dba-46d1-ada4-03191667a0b5/xavomasekerozelawajopepel.pdf
    • https://uploads.strikinglycdn.com/files/fc26e426-5864-491b-80b3-ab6526ab170d/59048570223.pdf
    • https://uploads.strikinglycdn.com/files/c6de2ef6-b088-45d4-ba03-efb2b6f4e6cb/dolakaxi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc3b.bin
6aaa496e91291179b8cc8ad81ff4f60194e7c83e44ba4090145b883b7bb829ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC3B 5712 bytes
font_01_sfnt_off0000cf9b.bin
df1fd5d3a818af4e0861c3c336ba34a42f0aae8f2844f146fd3e4c55e6cef658		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9B 9996 bytes

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