Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c32e43e6331ad5…

MALICIOUS

PDF

76.8 KB Created: 2021-06-14 03:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7dce3f4eccd61f30c9a4d701cdabce69 SHA-1: 3dd021a4791803adc150d201c31fbb75d957e46d SHA-256: 04c32e43e6331ad50a017926762b73641d9d816cfce78f76f5958a9499cf3827
194 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, classifying it as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest a spearphishing attachment vector, aiming to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://irlanc.ru/pbw?utm_term=vande+mataram+song+by+ar+rahman+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495837/normal_60bcd7fde3a45.pdfIn PDF document text
    • https://tuledekubixa.weebly.com/uploads/1/3/4/7/134722649/6738088.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407747/normal_6018b5b34b156.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446015/normal_6021951db7e0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448984/normal_603b6c1dca978.pdfIn PDF document text
    • https://walotowujiko.weebly.com/uploads/1/3/4/5/134582573/togibeseve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446379/normal_6021073ee6c54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424991/normal_6018f512769d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495849/normal_601212060d616.pdfIn PDF document text
    • https://xojojesiz.weebly.com/uploads/1/3/4/2/134235357/panotinixi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://wojoxevom.pbworks.com/f/21077987014.pdfIn PDF document text
    • http://xewubamefa.pbworks.com/w/file/fetch/145276572/linux_mint_19.2_xfce.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bb9d86c-6718-4d93-8d2e-d1f108afd070/79651612360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3002268-1d59-49e2-aa37-02db45720854/the_power_broker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10198e66-4131-4956-b959-c524d15be585/the_story_of_one_direction_x_factor.pdfIn PDF document text
    • http://lofupevaki.pbworks.com/f/bebateputapelomupuvifak.pdfIn PDF document text
    • http://kigiputilik.pbworks.com/w/file/fetch/144632619/romurinewurojugagipana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/967989ec-0d67-4c0e-8063-51fdb37fef13/kowofokuk.pdfIn PDF document text
    • http://xupatamim.pbworks.com/w/file/fetch/145119852/exercise_on_direct_to_indirect_speech.pdfIn PDF document text
    • http://famukaser.pbworks.com/f/3170631801.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_off0000dd0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0A 5536 bytes
SHA-256: aa5eaf513442735e05f98e3625c4b113d530ee13015d0269e8ab2d297bd082e3
font_01_sfnt_off0000efc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC3 5024 bytes
SHA-256: bf86f855d81b094c0fe6ef2487702494f94a8d057d4fb6fe46edf8bdca66d9c7
font_02_sfnt_off0000ff26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF26 11244 bytes
SHA-256: 3df7e93474a05f54abd01b44cd2b96842168cbfaa47bd084e7e75c42823137ea