Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a04b7fdb125fd91…

MALICIOUS

PDF

74.8 KB Created: 2021-03-25 06:45:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 790690f76f79b62a0cb50956e4d2ec41 SHA-1: cef16e30443a8178052b80f7d81ded696ee7d878 SHA-256: 7a04b7fdb125fd9153c0f12d5ed98528e5842cec52c6381676abdb0fef5f4145
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing numerous external URIs. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. While no scripts were extracted, the presence of many external links suggests an attempt to redirect the user to potentially malicious websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/wix?keyword=udyr+skin+minecraft PDF link annotation
    • https://nodifolosorak.weebly.com/uploads/1/3/4/7/134758422/dogukinuxukuf-sawodejitifusa-labidumuva.pdfIn PDF document text
    • http://wosozage.mypressonline.com/1701509810.pdfIn PDF document text
    • https://cdn.sqhk.co/dutedape/wFhbggY/ligijewasisijurad.pdfIn PDF document text
    • https://denepuwukofakar.weebly.com/uploads/1/3/4/3/134316944/d7503.pdfIn PDF document text
    • https://nopubogap.weebly.com/uploads/1/3/4/6/134667077/gikoporajozari.pdfIn PDF document text
    • https://cdn.sqhk.co/gufojakig/gghieie/11425052226.pdfIn PDF document text
    • https://mubasaji.weebly.com/uploads/1/3/4/8/134846322/31a7c87608.pdfIn PDF document text
    • https://lurekoba.weebly.com/uploads/1/3/4/0/134018443/ralirenabifog-gibapewevogu-xunevedakarifo-juxum.pdfIn PDF document text
    • http://fijexojor.getenjoyment.net/what_is_the_cost_of_a_new_rainbow_vacuum_cleaner.pdfIn PDF document text
    • https://sesanejaw.weebly.com/uploads/1/3/1/4/131407178/417055.pdfIn PDF document text
    • https://mapivabivex.weebly.com/uploads/1/3/0/7/130776319/9674406.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/6ijigid/highway_34_rv.pdfIn PDF document text
    • https://cdn.sqhk.co/wozobifanu/hieheib/50848817796.pdfIn PDF document text
    • https://cdn.sqhk.co/xomorenut/Fji31bC/spatial_sound_card_license_file.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/bufipevuril/73073079613.pdfIn PDF document text
    • https://6478d21b-237c-41b5-add8-96d7b9819624.filesusr.com/ugd/c7ef1a_d7270756fcad4638822a5d77bbf56896.pdf?index=trueIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_9ba8b33bfe604c1b8a442a94d24106c0.pdf?index=trueIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_2add77bb7ad4451b93ce2264c485b87c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/is_peloton_the_best_indoor_bike.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/gabore.pdfIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_c2f3123ac2a44f96976c2bb663570e6e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/gupimigezinofa.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/autodesk_inventor_2020_essentials_plus.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/how_to_remove_lg_refrigerator_light_bulb_cover.pdfIn PDF document text
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_4c296324c6b240958d0a1f158d0a0c51.pdf?index=trueIn 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_off0000e629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE629 5292 bytes
SHA-256: e4acf59a8258ddc32b07252483da503ff1f8cf1d84847b4768ec36f21f953f6a
font_01_sfnt_off0000f826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF826 10632 bytes
SHA-256: 508d3a37ebfcf7ddd9adbc110140f187610731ed17d429fb703d5f1c60b1752f