Malicious PDF — malware analysis report

Static analysis result for SHA-256 725f32883b85b958…

MALICIOUS

PDF

68.3 KB Created: 2021-01-06 13:42:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 85bda4421a3a619d68cb3daa04142397 SHA-1: 4c44859d29b45d025772a9415d8d334347a6cded SHA-256: 725f32883b85b958c827e223de788ffe278f38183a07a4f022423eeeb385cb61
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic indicates a direct link to known malicious redirector infrastructure. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://gettraff.ru/aws?utm_term=finding+fractions+of+numbers+ks2+worksheets In PDF document text
    • https://nekekijubexofus.weebly.com/uploads/1/3/4/5/134587401/barizifelote-narilexevibal-kelowuv-wanazotazinexi.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/lexajuxuwedupu_gefajinuvuf_nofuwekinafe_pimedi.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinipaz/Lhaihgd/blade_io_guide.pdfIn PDF document text
    • https://karesaxu.weebly.com/uploads/1/3/5/3/135392924/gelusaz-dujaviluride-dinodeduw.pdfIn PDF document text
    • https://cdn.sqhk.co/menigopas/jgPh578/1267728642.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/dadupawo/51890142608.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/babylonian_system.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/46370498112.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/88524843703.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/21385733305.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/245dd255-f01f-4c7c-bc80-cf9ca253f39f/lanilodarumibasuf.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/giwagagalijefe.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/duwogak.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_off0000c002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC002 5668 bytes
SHA-256: 48c2d423976ddf58822c5de5e2f5a6799906864231eabc59bcd9755e04dfd21a
font_01_sfnt_off0000d32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32E 10224 bytes
SHA-256: 453dcc9a225c0fe69bb4bf0bb3f2645bb80ec4b9dc147e3bbd35f129f5b02571
font_02_sfnt_off0000f5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E8 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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