Malicious PDF — malware analysis report

Static analysis result for SHA-256 200e9f52d2ca49d5…

MALICIOUS

PDF

66.8 KB Created: 2020-11-12 21:34:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 100eee58f1f9364570b0fb45ec3e49c8 SHA-1: d66c14c848e52a83f0b45c763a43e3dc092bc59b SHA-256: 200e9f52d2ca49d579364e014e73ebde3b597c69ceb0465db9caf4dba244ff0d
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link

The PDF contains numerous embedded links, many pointing to disposable hosting and redirector services, indicating a link farm designed to drive traffic to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gettraff.ru/123?utm_term=pastoral+intern+job+description In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392650/normal_5f8e33f0b1da4.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/tusog.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/992f0.pdfIn PDF document text
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/6588788.pdfIn PDF document text
    • https://xewebetolibas.weebly.com/uploads/1/3/4/3/134372476/vaket.pdfIn PDF document text
    • https://sefufomoxuve.weebly.com/uploads/1/3/4/5/134528328/8897094.pdfIn PDF document text
    • https://vigofamuzozovi.weebly.com/uploads/1/3/4/6/134671609/gokavumi-lonarenozuvap.pdfIn PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/tosafuwovama.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/jafujasiwetid/bafuridozogiruv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d08238f-1b12-4ff2-bd5a-f3ad89658600/boxodedirujixotodorumosun.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_off0000bbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB7 5072 bytes
SHA-256: ee2caf1aa1448df048695cb85eaf80d2c22f8ea37ffecb0fad7b061a01ea1cac
font_01_sfnt_off0000ccf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF0 10508 bytes
SHA-256: 0058af89dbdf70f90fb679cad10bf8aaa1654a8ffed7a82508176847cd49fe86
font_02_sfnt_off0000f0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DF 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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