Malicious PDF — malware analysis report

Static analysis result for SHA-256 1146392bd8dc50b0…

MALICIOUS

PDF

78.2 KB Created: 2020-11-12 19:32:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8d9605ca3cd7878e492a9d5e915fe245 SHA-1: 9887df0004346d5d4c628cc70ed328a27a6a0b1c SHA-256: 1146392bd8dc50b0734713f9cbe429cceaf3d4b21b98d384bf2de1c265c3cc64
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is classified as malicious and contains a significant number of embedded links, many pointing to disposable hosting services and redirectors. The heuristic firings indicate it functions as a link farm, likely designed to redirect users to malicious sites or for SEO manipulation. While no scripts were explicitly extracted, the nature of the embedded links and the ML classification suggest an intent to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://traffmen.ru/123?utm_term=klipsch+rp-280f+vs+rp-8000f In PDF document text
    • https://mamaganonofob.weebly.com/uploads/1/3/4/6/134602085/45b0c3447.pdfIn PDF document text
    • https://gudagomafefaxer.weebly.com/uploads/1/3/4/5/134523608/xuwefemuxamajasevera.pdfIn PDF document text
    • https://solusolifodijal.weebly.com/uploads/1/3/4/4/134433047/5735319.pdfIn PDF document text
    • https://bejasesazopo.weebly.com/uploads/1/3/4/5/134512805/5ca9e848078.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/2702030.pdfIn PDF document text
    • https://tugoxalimirufa.weebly.com/uploads/1/3/4/3/134310877/gamirebaxes-vuvuletuwujup-wolir-nolix.pdfIn PDF document text
    • https://vifoxofanope.weebly.com/uploads/1/3/4/6/134670603/6930365.pdfIn PDF document text
    • https://ralokokotozupar.weebly.com/uploads/1/3/4/3/134340958/cc565a702513.pdfIn PDF document text
    • https://masogipu.weebly.com/uploads/1/3/1/6/131606875/jenatobamunir-bemegu-pezaninivime.pdfIn PDF document text
    • https://noxutepobop.weebly.com/uploads/1/3/4/5/134510102/raxed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aa2d890-7333-4b72-8ee6-7d92ae01e5e6/97456953800.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/panasonic_vl2020_3v_rechargeable_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bb4d3ee-1f45-4d39-ba08-dbbd820cb476/tall_white_storage_cabinets_with_shelves.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_off0000f60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60A 5424 bytes
SHA-256: 74697436f79b81c1614cc8111e11fab7930540eaace9f0bbb06705457e2dbd02
font_01_sfnt_off00010893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10893 10488 bytes
SHA-256: c9f435516cf2659adf66353edc1ee974095528a5f2dac804e148d08e1bdc61ba

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