Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c85cdf2eb5f549…

MALICIOUS

PDF

68.4 KB Created: 2021-02-20 02:20:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 7d8c45a2bc601ae0e08a9d7a6bc08e57 SHA-1: dc21496db14bce5d6947c8aea05bf6ffb97b6cdf SHA-256: 32c85cdf2eb5f54936d283dd856f5a34c1acbcc8d96a24577cc275422ee16548
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many hosted on disposable domains, indicative of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://seumenha.ru/strik?utm_term=toyota+tacoma+rust+repair+panels PDF link annotation
    • https://jabibodusap.weebly.com/uploads/1/3/2/6/132681053/6b573a6.pdfIn PDF document text
    • https://cdn.sqhk.co/firumefetev/jegjyih/radio_super_folk_104._7_fm_en_vivo.pdfIn PDF document text
    • https://cdn.sqhk.co/mujejadalale/jbfhc8B/speak_to_the_manager_haircut_dog.pdfIn PDF document text
    • https://dibarovufi.weebly.com/uploads/1/3/0/7/130776786/tamubesorek-retugo-nezavot.pdfIn PDF document text
    • https://vakenufepuxino.weebly.com/uploads/1/3/4/5/134529081/398987.pdfIn PDF document text
    • https://kutenamig.weebly.com/uploads/1/3/0/7/130740069/2662112.pdfIn PDF document text
    • https://zokevuwokonumez.weebly.com/uploads/1/3/4/6/134682223/2158965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479715/normal_602eaf3240125.pdfIn PDF document text
    • http://wizatone.iblogger.org/42230554083.pdfIn PDF document text
    • https://xesanojazal.weebly.com/uploads/1/3/0/9/130968931/7733280.pdfIn PDF document text
    • http://pufemebulod.22web.org/action_research_for_b._ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403807/normal_5fefd740dfb92.pdfIn PDF document text
    • https://paxubemimowam.weebly.com/uploads/1/3/0/7/130739876/mowijij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416806/normal_6023f4d0b0e70.pdfIn PDF document text
    • http://fogonoruso.iblogger.org/91640475442.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/tijxjgM/20340521444.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wenimawibi.epizy.com/74015760042.pdfIn PDF document text
    • http://zefepelifepo.rf.gd/irregular_at_magic_high_school_light_novel_wiki.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_off0000ccb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB8 5132 bytes
SHA-256: 2ee6d4558f236a6f7e9f5344c827371eaa6ddd29e88dca4a29b40f48675bf40b
font_01_sfnt_off0000de1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1E 10828 bytes
SHA-256: 73292efab8fd9fdc7a108b5c0a8990edf1b2d6da97f05ac7c15427a729d1c5b6

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