Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5a04a080469de29…

MALICIOUS

PDF

65.4 KB Created: 2020-11-26 05:39:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1332ee36029600d59ee5a70a16016c2b SHA-1: dea924dd4c05907e0e14dc0e522b8fd6dbbc1973 SHA-256: c5a04a080469de299efa381c36aee38b136ac47204a53498b1a78cb828b5812e
252 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to known malicious redirectors or disposable hosting. The primary function appears to be acting as a link farm to direct users to potentially harmful websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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/strik?utm_term=sangean+pr-d7+service+manual In PDF document text
    • https://jikuvagipotax.weebly.com/uploads/1/3/4/6/134647272/topim-tuganelugola.pdfIn PDF document text
    • https://susutabum.weebly.com/uploads/1/3/4/4/134464128/dezumeze_beluximigu_ledubo_fotago.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ratot_muweliwamopoj.pdfIn PDF document text
    • https://gajokemijibefe.weebly.com/uploads/1/3/4/4/134467094/f3015571606b21f.pdfIn PDF document text
    • https://pudonaneguk.weebly.com/uploads/1/3/4/7/134767047/lixuvez.pdfIn PDF document text
    • https://lejoxenususoja.weebly.com/uploads/1/3/4/4/134497781/basuxofalibanavijoni.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/vesafupabolo_sizam_zidosuz_fokuziwe.pdfIn PDF document text
    • https://ponitunol.weebly.com/uploads/1/3/4/7/134747778/pijofuk.pdfIn PDF document text
    • https://balijuwil.weebly.com/uploads/1/3/4/4/134403438/biginugejagitosa.pdfIn PDF document text
    • https://dajexave.weebly.com/uploads/1/3/4/3/134352807/pazapalerorunuw_pefamaxegipeti.pdfIn PDF document text
    • https://rukazoxet.weebly.com/uploads/1/3/4/0/134040508/xadajugepulurorez.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/zirojopemup/16635076849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/783aa71a-ab00-460a-9f73-008254fc845b/79030908705.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_off0000b41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB41B 3116 bytes
SHA-256: 79a6dabe604c83ed6c0307df1989d37882a9ab5e62a3c13e44c8eaf698e7ff38
font_01_sfnt_off0000bf4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF4B 5668 bytes
SHA-256: 9e5b5b0ba00c9e6f5affd0461f3457b62d5114c447d55c9ed3b3bebb177ed6cd
font_02_sfnt_off0000d299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD299 11372 bytes
SHA-256: 5380c8e24fa80c62cf4728cf90b8e7fe9539b6c7ac48495b38e1d3bdabd6fadd

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