Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f572cded52dde2f…

MALICIOUS

PDF

74.7 KB Created: 2020-12-05 19:28:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4eed232eaaa58eb0433e50c248f9f43 SHA-1: 7d855dcca5458f7bb537d68d9d8ddf14fe926eeb SHA-256: 2f572cded52dde2ff2497f36181a2c65620643604e06b7e53c7c4e176bdedde5
214 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, with one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous external PDF links suggests a link farm or phishing campaign designed to lure users to potentially harmful content.

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://traffmen.ru/123?utm_term=22nd+anniversary+gift+traditional
    • https://cdn-cms.f-static.net/uploads/4385198/normal_5f9e81884344e.pdf
    • https://geredape.weebly.com/uploads/1/3/4/3/134349068/lidisabarovoletalu.pdf
    • https://zoxusikajikad.weebly.com/uploads/1/3/4/8/134851315/pasiv_metitamazeva_xupowebana.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static1.squarespace.com/static/5fc59b71c6229360ecccef93/t/5fcb8e99393ce47356356e69/1607175833305/42973726136.pdf
    • https://static1.squarespace.com/static/5fc528842cf09257bd8747f2/t/5fc5f1353c6ccf69f32c2eae/1606807861166/65746880679.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdff10f3de5e49b52a7649/1606287122179/mahwah_bar_and_grill_delivery.pdf
    • https://s3.amazonaws.com/pukiza/nerakiram.pdf
    • https://s3.amazonaws.com/debamijizozexo/2017_jeep_wrangler_performance_parts.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf0288bc8713fe6fc7c2e/1606217768698/the_house_on_mango_street_free_online_book.pdf
    • https://static1.squarespace.com/static/5fc002e7e5c7695ca996b6a8/t/5fc225f83485235c860f77f9/1606559225571/skyrim_immersive_creatures.esp.pdf
    • https://static1.squarespace.com/static/5fc1380dc6d9645836244656/t/5fc31af818e72e5fdb3df909/1606621945029/20s_halloween_costumes_mens.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8d5.bin
6a9dc80f84e0c01cc182cff15409f1c28bd03b155507d7ecac725c34b6b87126		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D5 5060 bytes
font_01_sfnt_off0000ea17.bin
38d061961da6204185e2ab5d414550dd824d39b5ceca3ef4b17d30e2b723cc5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA17 11228 bytes
font_02_sfnt_off00010ffc.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFC 4324 bytes

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