Malicious PDF — malware analysis report

Static analysis result for SHA-256 75229926758760d7…

MALICIOUS

PDF

62.2 KB Created: 2020-12-28 10:09:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbcdfb6952daffdac26123f39cacb5ba SHA-1: 17071eba78507cf7adc128c297c09ccbf31817e2 SHA-256: 75229926758760d7bbb5924d526952dc1174a68e62fc585828849a19c891c57f
244 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links pointing to external PDF documents, many hosted on disposable domains or known redirector infrastructure. This behavior is indicative of a link farm, likely used for SEO manipulation or to distribute further malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=accumulation+function+in+abinitio
    • https://cdn-cms.f-static.net/uploads/4427095/normal_5f9f25d78c349.pdf
    • https://sakuvida.weebly.com/uploads/1/3/0/7/130775714/6766143.pdf
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5f89396cec96e.pdf
    • https://cdn.sqhk.co/veleviziwew/PRRih4N/black_rifle_coffee_club_commercial.pdf
    • https://xidepiluzefet.weebly.com/uploads/1/3/4/4/134465828/3044955.pdf
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/613a711ec7ef.pdf
    • https://cdn.sqhk.co/dupeguwova/hahchhS/princess_coloring_book_glitter.pdf
    • https://static.s123-cdn-static.com/uploads/4408481/normal_5fc6783930c34.pdf
    • https://mupexopuwes.weebly.com/uploads/1/3/4/7/134722910/zajadoz-kixoxal-samizu-madanabogorute.pdf
    • https://cdn.sqhk.co/lisesemafo/hahaGhd/parkside_australia_current_time.pdf
    • https://rexolofozex.weebly.com/uploads/1/3/4/3/134368018/784241.pdf
    • https://cdn-cms.f-static.net/uploads/4471946/normal_5fad27a9f00fb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000b5fe.bin
bddbbea85380ea49e57dbbaaa8f095c030a384a66dc99519941126d805bcb80d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5FE 4884 bytes
font_01_sfnt_off0000c692.bin
0bd9b495272f7ec84e7d457d154bbecbf716aec86886cb6ed10381a8a4264d4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC692 10984 bytes

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