Malicious PDF — malware analysis report

Static analysis result for SHA-256 74786470fc000a4a…

MALICIOUS

PDF

79.9 KB Created: 2021-05-31 02:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 064aec7cfe74f138d238c2d4b5c7602a SHA-1: 4b4cd54f6e4906398a15fd19f08871d2a395d2cd SHA-256: 74786470fc000a4a1a532839279cd6ad5882de6d2153c28261dc4d2897d9ac79
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely contains malicious content or exploits. The heuristics reveal it functions as a link farm, embedding numerous external URLs, many hosted on disposable domains like Weebly. This suggests an attempt to manipulate search engine results or redirect users to malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/wb?keyword=what%20does%20the%20bible%20say%20is%20the%20meaning%20of%20life PDF link annotation
    • https://pedodexojur.weebly.com/uploads/1/3/0/7/130775447/tewosuzome_xugedotis_gijatiwiruzuxun.pdfIn PDF document text
    • https://lefokanu.weebly.com/uploads/1/3/4/3/134377273/e449a5e9.pdfIn PDF document text
    • https://nodajalij.weebly.com/uploads/1/3/5/9/135990600/99cd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378379/normal_5ff522d2879a5.pdfIn PDF document text
    • https://woloxujujesif.weebly.com/uploads/1/3/4/7/134716607/3c35c11fd05.pdfIn PDF document text
    • https://moleresudiba.weebly.com/uploads/1/3/4/4/134447347/6573052.pdfIn PDF document text
    • https://vokijovagugudis.weebly.com/uploads/1/3/0/7/130776016/3920401.pdfIn PDF document text
    • https://kupubasurunasoz.weebly.com/uploads/1/3/4/6/134695217/rudadebibenegifujepu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415537/normal_606defddaec56.pdfIn PDF document text
    • https://jorikune.weebly.com/uploads/1/3/4/3/134371696/3538836.pdfIn PDF document text
    • https://rogewakaz.weebly.com/uploads/1/3/2/8/132815912/depovije.pdfIn PDF document text
    • https://gofabede.weebly.com/uploads/1/3/1/4/131453232/nasililujugi.pdfIn PDF document text
    • https://pibefabetanob.weebly.com/uploads/1/3/4/3/134376782/guxigiro.pdfIn PDF document text
    • https://wawukonuxoni.weebly.com/uploads/1/3/4/0/134095992/kafodutejipuxoga.pdfIn PDF document text
    • https://nebofubegifeso.weebly.com/uploads/1/3/1/4/131437549/zemasuminozogu.pdfIn PDF document text
    • https://zufulakoloti.weebly.com/uploads/1/3/5/3/135301661/tidajotim.pdfIn PDF document text
    • https://nutolaje.weebly.com/uploads/1/3/4/5/134596366/b027128b2be5cb.pdfIn PDF document text
    • https://paxituzupinemof.weebly.com/uploads/1/3/5/3/135303349/salinelufamofatopum.pdfIn PDF document text
    • https://raxipufed.weebly.com/uploads/1/3/4/4/134474150/6601220.pdfIn PDF document text
    • https://zaridonuxubotu.weebly.com/uploads/1/3/0/7/130775126/botulop.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/9ce825fc-31e5-4eeb-8e6a-b13e9bb915e4/an_anthropologist_on_mars_seven_paradoxical_tales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f766e2d-b4ad-480c-a9fa-fee6837a53b2/71628224340.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d760f6-a766-4302-9315-219ef99d293d/house_upon_the_hill_lyrics_amanda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b7c6d67-4a8b-40a7-a439-05866ccdfddc/54704337179.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_off0000f9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AF 5480 bytes
SHA-256: 33b8ff9c04fe7b9d3d4962d67e129c5e9af6f8b5192229b85056e5dde9b15def
font_01_sfnt_off00010c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C48 10496 bytes
SHA-256: 6be88cdb99506943df09e42de61bd1455e332f7ec405a134db995b6dc4b5b5f6