Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aae04d675b10975…

MALICIOUS

PDF

69.9 KB Created: 2021-04-21 08:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bd1b55fe81e69fbae117d80da5e110ad SHA-1: 10446186fc71d6808f997d38c9e29723a7cb9bfb SHA-256: 9aae04d675b109752f96a99dbc0b14b5436b6bf8a5efbcb9798c4f6d8c1415a1
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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://xezojetit.ru/strik?utm_term=husqvarna+128ld+recoil+starter PDF link annotation
    • https://buwofapakudo.weebly.com/uploads/1/3/5/3/135316190/kusexumorerefo-sokaligebabu-wepudona.pdfIn PDF document text
    • https://cdn.sqhk.co/woluzadeviv/iZ7CNhb/pokemon_go_shiny_list_dec_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486350/normal_6066d6a53bfa9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469634/normal_5fcf603db5f76.pdfIn PDF document text
    • https://wupovejiti.weebly.com/uploads/1/3/2/8/132814541/ramodo.pdfIn PDF document text
    • http://jonipifenukiz.mygamesonline.org/facial_recognition_system.pdfIn PDF document text
    • https://selenaza.weebly.com/uploads/1/3/4/8/134878333/d01b8d4fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456686/normal_601548342d4eb.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefaxeker/7Oe4ejd/vakipofupiwemoruwajudox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414494/normal_6039f191f120a.pdfIn PDF document text
    • https://cdn.sqhk.co/wirubetena/Egjwhi9/10183024198.pdfIn PDF document text
    • http://kurudapod.medianewsonline.com/scripps_spelling_bee_word_list_2020.pdfIn PDF document text
    • https://robugagemo.weebly.com/uploads/1/3/5/3/135304688/9dd93.pdfIn PDF document text
    • https://metiledozixav.weebly.com/uploads/1/3/1/1/131164016/fulugufebebibif_dawisodosomomu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370090/normal_5fe39d953f3e0.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/95df2201-f9a4-45d6-8f10-98c4ae360c74/najekemotozazegux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f559083-0fe6-4b1e-8f8d-94f66c5f96c7/sullair_185_compressor_oil_level.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2af55e2-cdda-4729-ae9e-26892e4125e1/23966759481.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68c916ea-1d98-4b7f-b9eb-f2bc4b870480/sixafuserexobevosefiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d0d14d7-57f1-4248-a151-e5851ed9885b/how_to_pair_ue_megaboom_speakers_together.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c78be078-1684-48da-8b29-28b7fe4f49e5/visual_basic_2017_express_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaea98f3-f9a8-4f16-9ffb-8bdde32e625e/zadufuvobuwuxubelof.pdfIn PDF document text
    • http://betakudo.atwebpages.com/how_can_you_tell_if_the_inducer_motor_is_bad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c13b97b2-0838-41e5-98f5-5e56e6d19baf/anselms_ontological_argument_for_the_existence_of_god.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/962ad5bb-9135-4f57-ac82-39891a43e096/36862729326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e0c991b-bd41-42fe-be43-d85d65234d96/wufifega.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_off0000d377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD377 5456 bytes
SHA-256: 3dee767f8253f51e5e67a863b8c99ee4951356b50cabd3ee762827389e32cd24
font_01_sfnt_off0000e615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE615 10380 bytes
SHA-256: a9ec8e6d37a3d857ef0ee41ca506bf2210b80e3bf042d69f94251af0a4c91783