Malicious PDF — malware analysis report

Static analysis result for SHA-256 4205ca786a3da189…

MALICIOUS

PDF

72.5 KB Created: 2021-02-15 09:43:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bd933f7c52f7656986f6b2aa577f8ef8 SHA-1: fcdc4cb0534717cb05eb14a5b8340e5c22ac85e9 SHA-256: 4205ca786a3da1893564266938873c7a0eefce8ecb4020af3b330310744c4826
214 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yafferge.ru/strik?utm_term=oscar+health+insurance+tempe+az In PDF document text
    • http://jatuligirez.22web.org/hum_hain_bemisal_full_movie_mp4.pdfIn PDF document text
    • https://lapudaxorekoj.weebly.com/uploads/1/3/0/8/130814283/sasevaxusemiro.pdfIn PDF document text
    • https://zugixipenelir.weebly.com/uploads/1/3/4/5/134591811/botug.pdfIn PDF document text
    • https://sudarotabodubig.weebly.com/uploads/1/3/1/4/131407445/naxaluxaxomasejije.pdfIn PDF document text
    • https://sirabirimafo.weebly.com/uploads/1/3/0/7/130739431/6777904.pdfIn PDF document text
    • https://tuzakalo.weebly.com/uploads/1/3/4/4/134492431/6bc9077fac733ba.pdfIn PDF document text
    • https://filogeruziwumu.weebly.com/uploads/1/3/1/4/131406947/5934049.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/votawawo/laporan_kasus_bronkitis_pada_anak.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/1702629471.pdfIn PDF document text
    • http://topajikof.epizy.com/free_fake_divorce_certificate_templates.pdfIn PDF document text
    • http://senapofo.epizy.com/goporurosirurilojeborumi.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/fetal_circulation_review.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/bellevue_parks_and_recreation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/fatipagokevadamoxesita.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD141 5020 bytes
SHA-256: e550f539e4e194672779393a96a329a6a6fcba04cd364cc49f954e9ce2e4c33e
font_01_sfnt_off0000e225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE225 10660 bytes
SHA-256: 2d9b89b7f8869e9223f0db3c40d85be3ab99d55a7e79de9171292f128418e4c4
font_02_sfnt_off0001068d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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