Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34285fd03604f4e…

MALICIOUS

PDF

80.5 KB Created: 2020-11-24 17:58:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 96e83fffa5db64d2ff891199499602df SHA-1: b39811d44e07a9a19b75a9f6cd8f72d267d20265 SHA-256: d34285fd03604f4eac2bd3dee2657433823493c2c625caf92b70eed704821c35
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection scheme. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies a link to known malicious infrastructure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/aws?utm_term=emanation+extreme+ffxiv+guide In PDF document text
    • https://jatufajikovuna.weebly.com/uploads/1/3/4/7/134719937/7329154.pdfIn PDF document text
    • https://kilorokininoru.weebly.com/uploads/1/3/4/4/134470368/834253.pdfIn PDF document text
    • https://zonepebitebebo.weebly.com/uploads/1/3/4/3/134369254/2066792.pdfIn PDF document text
    • https://zumofimuletoxol.weebly.com/uploads/1/3/4/0/134018509/5946339.pdfIn PDF document text
    • https://gitinegu.weebly.com/uploads/1/3/4/6/134648864/bikivavagoz.pdfIn PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/tipikemefuk-gegole-sajixa.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/giwurode/resuvireledomexora.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/85486677744.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/1452886155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63e82e81-f841-4d20-803b-2d60b8fd943d/68166306610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78174373-ea85-4bf2-9fde-70305b4b41aa/42273569018.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/6481527005.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BB 4984 bytes
SHA-256: 434289348a8e29530c1f9e83aae650015c25efa85dcfb61045fcdd25780ec36e
font_01_sfnt_off0000e498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE498 12920 bytes
SHA-256: b79407a52d0a9d49395fd74aef6fb1b60980ac495204646888c2db9a6756fa50
font_02_sfnt_off00011058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11058 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073
font_03_sfnt_off00012520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12520 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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