Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e043e0064c4ec1…

MALICIOUS

PDF

69.2 KB Created: 2021-01-01 17:59:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 406fed71c2475615acdbe10e248e3159 SHA-1: 756ce8ed0d0c103bfde420ff9b1124d85419d5f1 SHA-256: 64e043e0064c4ec1614511a88f8bed617296ecb9c77721beb220ed2ae7b7a9f2
244 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to link farms hosted on disposable domains, indicating a malicious intent to redirect users to potentially harmful content. The heuristic firings, particularly 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM', strongly suggest this is a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the nature of the embedded links and the ML classifier's high confidence score support this assessment.

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://ggtraff.ru/strik?utm_term=my+little+pony+pocket+ponies+android In PDF document text
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/logesapijobovu_koxoguvakenara.pdfIn PDF document text
    • https://cdn.sqhk.co/kewusikata/QAOibgi/lokezusopufujovube.pdfIn PDF document text
    • https://cdn.sqhk.co/lamajemomu/Ynufie8/55650392300.pdfIn PDF document text
    • https://belafawejogawol.weebly.com/uploads/1/3/4/5/134583754/jakadaworulozazur.pdfIn PDF document text
    • https://dewufore.weebly.com/uploads/1/3/4/8/134857007/rukog.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/jhZWiiu/call_of_duty_warzone_xbox_one_download_time.pdfIn PDF document text
    • https://baxomowimesadud.weebly.com/uploads/1/3/5/3/135303612/tusarubolodaka.pdfIn PDF document text
    • https://cdn.sqhk.co/jevipugirofi/gWhgidg/medepapomazuruzuzo.pdfIn PDF document text
    • https://tezadogiva.weebly.com/uploads/1/3/4/5/134522012/5427565.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5f8c67b5e1c60.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bivanud/sri_rudram_namakam_chamakam_telugu_download.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/24058012519.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/industrial_meat_grinder_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/45793706815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7253c98a-b3d7-4b34-baf0-55041ccbee0b/4120602396.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_off0000cec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC1 5236 bytes
SHA-256: c69de16632c2a15ccc14c5723c9b28ff7f8b71536b30dc8850846ddea327d4f5
font_01_sfnt_off0000e0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B5 11484 bytes
SHA-256: 3072707dad7fe8cc256370e727f44f1d3aa4c1f256fc02a2242c630ad7a84906

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