Malicious PDF — malware analysis report

Static analysis result for SHA-256 217094c02c1367f1…

MALICIOUS

PDF

68.6 KB Created: 2020-12-18 15:04:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f32c5116b95b03d0d4f3a35fdefb2087 SHA-1: 8bc5ed8f7495b776797fb9ab3465f3699f07c262 SHA-256: 217094c02c1367f1cea33fb22b62ed6cd50b44bc7551dc4bec7248efbfb05440
244 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics as a malicious redirector and link farm. It contains numerous embedded URLs pointing to disposable hosting and a known malicious redirector, suggesting an attempt to lure users to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/strik?utm_term=well+seasoned+word+whizzle+answers In PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/fefd9cb.pdfIn PDF document text
    • https://worivoka.weebly.com/uploads/1/3/4/5/134588103/c2d97fe897b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403540/normal_5fa3c10588089.pdfIn PDF document text
    • https://tagarimoruta.weebly.com/uploads/1/3/4/3/134320697/5ff03622254c.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/kasibe-mibotuwesetoz.pdfIn PDF document text
    • https://tuboxivodase.weebly.com/uploads/1/3/4/3/134387713/23191ca548398.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/wobamuxisad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xumakomowi/xosuk.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/5971992323.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc389629955c744b54c2322/t/5fc495b5e18c5c478e8dbc5d/1606718901776/sweetbitter_stephanie_danler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f559b38f-4cab-4e3b-88ce-d600c66b408f/juwutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/401d3153-d829-4f10-8ef9-a9c0ce7ebb12/canon_eos_rebel_sl1_manual.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_off0000c45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC45F 4776 bytes
SHA-256: 6c3b2a778ac545c9f27a9ef84ee249816a02aa972759f15d6c23fdedd9abfb8a
font_01_sfnt_off0000d494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD494 10192 bytes
SHA-256: 6bc69cbe2e06a321436e2774d4e500c1e632163dddee9917dfb13d46c4205b4d
font_02_sfnt_off0000f77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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