Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdda6d2253ce11e5…

MALICIOUS

PDF

68.2 KB Created: 2020-11-11 22:34:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 599243a3938e1b2e4889448fd12b004e SHA-1: 19c2114b76e567a9902fbc129dc15c25c95b34d4 SHA-256: fdda6d2253ce11e509b67c5533ea37b9fe88754134783edd30a39ca7be98984e
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous embedded links, many of which point to disposable hosting services and are likely part of a link farm designed to drive traffic to malicious sites. One critical heuristic identified a link to a known malicious redirector, and the ML classifier strongly indicated maliciousness. While no scripts were extracted, the structure and heuristics suggest this document is designed to exploit users by directing them to potentially harmful content, likely as a phishing or scam lure.

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
  • 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/123?utm_term=bronsted+lowry+bases+list In PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/xoguruduzaw_nuboge.pdfIn PDF document text
    • https://mimoberojatef.weebly.com/uploads/1/3/4/3/134316463/642979.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388285/normal_5f9315ab64a1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5f890f968d518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370303/normal_5fa55b5f8cd69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403672/normal_5f916181acba3.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/dudejelutoxoweterif.pdfIn PDF document text
    • https://xakabitugaret.weebly.com/uploads/1/3/4/3/134366923/0d1e9ea6d2e.pdfIn PDF document text
    • https://nofawubepugo.weebly.com/uploads/1/3/4/3/134373843/lunesudulam.pdfIn PDF document text
    • https://redawisifakaw.weebly.com/uploads/1/3/4/4/134481039/gutamepi.pdfIn PDF document text
    • https://jimagofer.weebly.com/uploads/1/3/0/8/130813953/7f8b4c551e5c4.pdfIn PDF document text
    • https://kebudojud.weebly.com/uploads/1/3/4/4/134400915/dijiwi_xepinaxabufiw.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/jofunoje/yamaha_service_manuals.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/zoxoponizojizeran.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_off0000c33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC33A 4992 bytes
SHA-256: e722e99b3c32ae653bf9f20206197e5ffbaab3521e1ae13fbbe436303907eef1
font_01_sfnt_off0000d447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD447 9868 bytes
SHA-256: f33f3a2848a9746ddb5627a0c0901b57a3cd76b44c1ad80180deb5ef7306fb60
font_02_sfnt_off0000f615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF615 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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