Malicious PDF — malware analysis report

Static analysis result for SHA-256 44d6f3a5eb76d78b…

MALICIOUS

PDF

74.7 KB Created: 2021-03-03 11:41:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9c816d997cc581b7e7f28a266c2cb2e7 SHA-1: 8ba602b1edfcfcd5e064afbed4dbe78793627b5e SHA-256: 44d6f3a5eb76d78bb80c8c0bb2e632184027a409998cb6fdd527feb28a99a999
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, appears to be a lure related to household appliance repair, likely intended to trick users into clicking embedded links. The presence of external URIs and link farm heuristics further supports a phishing or redirection attack pattern.

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
  • 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.
  • 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://lozipotod.ru/123?utm_term=how+to+replace+kitchenaid+oven+control+panel PDF link annotation
    • http://vubitim.sportsontheweb.net/33353934743.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/jixovabakanaguxakusogojo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406771/normal_5fefd875d9293.pdfIn PDF document text
    • https://cdn.sqhk.co/pusuvizodez/pijzS4u/tibapivifu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423136/normal_6035f47dd8b92.pdfIn PDF document text
    • https://dosabaret.weebly.com/uploads/1/3/4/8/134861273/8678350.pdfIn PDF document text
    • https://retorize.weebly.com/uploads/1/3/0/9/130969817/kuvuravuxerere.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393348/normal_5fef44d2c45c2.pdfIn PDF document text
    • https://cdn.sqhk.co/bojiluxenome/icQa8gi/xetuwunobenikixopupa.pdfIn PDF document text
    • https://bobusenig.weebly.com/uploads/1/3/4/8/134866704/bifokaz-gibefajug.pdfIn PDF document text
    • https://vemosigexirapi.weebly.com/uploads/1/3/4/3/134387812/344dddd0b2a64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500450/normal_602e5f11163f4.pdfIn PDF document text
    • https://pesasujax.weebly.com/uploads/1/3/4/8/134882000/df41125c84.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kozogasivufi.myartsonline.com/58162505962.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A2 5160 bytes
SHA-256: c9bd0b1c0075b1615ad8fe29c063d905a44ae4025b7e68c7857d9a8b32978d34
font_01_sfnt_off0000f937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF937 10608 bytes
SHA-256: 2a3a8d03316351c3501a1c07103bd17275167279d1edc5b09427bc6c88a76a06

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