Malicious PDF — malware analysis report

Static analysis result for SHA-256 5352261c2089de70…

MALICIOUS

PDF

61.3 KB Created: 2020-11-24 23:44:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 262bf6f5560b29246902d0cbf0565ad8 SHA-1: 308e81ba0142b46db1c4620edae2466d27c6b7e2 SHA-256: 5352261c2089de704b8fd27129ddc40711832e4f6e1a1d6fe51a1b4019978fc5
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDFs hosted on disposable domains. One of the embedded URLs, 'https://traffking.ru/strik?utm_term=importance+of+decomposers', is identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution via the linked content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://traffking.ru/strik?utm_term=importance+of+decomposers In PDF document text
    • https://raserigu.weebly.com/uploads/1/3/4/7/134725151/11938a.pdfIn PDF document text
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/kodumov.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/c9ee3d.pdfIn PDF document text
    • https://kulinamolusamu.weebly.com/uploads/1/3/4/2/134234583/4882f813850b.pdfIn PDF document text
    • https://pepuzategazeg.weebly.com/uploads/1/3/1/4/131453576/wamivi.pdfIn PDF document text
    • https://wagofokixe.weebly.com/uploads/1/3/4/6/134694124/b3e5fae4080ea5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374362/normal_5f8c92c536862.pdfIn PDF document text
    • https://relowuforobelo.weebly.com/uploads/1/3/4/5/134528439/jonidokef_vufuwuvub_moduwaxu_nurabipomupo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3876ed44-88c0-4c3e-a51f-99341e820347/pejuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3560766e-a7a7-4e1f-99d4-893d354fb809/fisher_mama_bear_wood_stove_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f315b004-823e-4886-b905-5d06f5dbfda3/7573353511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed236368-5531-4169-bf91-74fb29ea8463/the_vampire_diaries_season_1_episode_22_dailymotion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ef07cba-e891-41fc-ba1a-90dc22474841/dazokujutuvikunosibewod.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_off0000b68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB68B 5208 bytes
SHA-256: 41d67a1a8cf7e619620b3eda9dd5e46b5004ebf19ca3c6c7388a3083ce1394ff
font_01_sfnt_off0000c823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC823 9560 bytes
SHA-256: dba436548c56ade588c95ecc9ab26cffcad32b917b26eb8c4cad7244b894445d

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