Malicious PDF — malware analysis report

Static analysis result for SHA-256 a046e116ae53ad73…

MALICIOUS

PDF

69.7 KB Created: 2020-12-06 17:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bd3975bed678e935eb3e31d4bfc37a71 SHA-1: b8f18d4ea12b1617a2480666fc7ec5b6aed226ee SHA-256: a046e116ae53ad732b057c4339109dacaa54d51330d3d19d069fceddc9b32746
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, indicating a link farm designed to manipulate search engine results or redirect users to potentially harmful content. The presence of external URIs and a link farm suggests an attempt to lead the user away from the current document to a malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffine.ru/strik?utm_term=how+to+find+slant+asymptotes+with+remainder PDF link annotation
    • https://batagokefo.weebly.com/uploads/1/3/1/0/131070859/c7a70a1ea59fdf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417221/normal_5fbbcc806104a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381976/normal_5fb92da95cb4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477921/normal_5fbc85328b5ff.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/taxejupozefeb-rufewodu-zezofowozebo-tupatokurisina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407070/normal_5fad98ad793ac.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/sijakezivexos-nafugeribeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426572/normal_5fadd5ad97aa6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409122/normal_5fc3ac723c0c6.pdfIn PDF document text
    • https://jobalexaxikut.weebly.com/uploads/1/3/4/8/134892204/ab69698f7bc3234.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fufaragebo/the_house_on_mango_street_essay_quotes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e552ec917750a3d7e003/t/5fc13829f8cdb769c60fb612/1606498346498/51840851646.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/57330388292.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/palmistry_in_urdu_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc382c93398ff75153e5d72/t/5fc80c9a723ab40260524b6c/1606945946814/radio_movie_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/91067170609.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 6

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E9 5436 bytes
SHA-256: c311cc905f1580bd35d388358afcb6e15f09de97163d950415f05d721bf3cf47
font_01_sfnt_off0000e355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE355 11172 bytes
SHA-256: 61cd5d8268bf53793edb9ccaa58db9ebccbde4b35814b7b52ff24652a4fc5e26

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