Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa7a62a49cad530…

MALICIOUS

PDF

80.6 KB Created: 2021-03-16 14:35:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0f2d4d4a284fa01ed6f568eaf16c208e SHA-1: 2e34e31c3d224a312940a98e5ad3c22af50b367d SHA-256: 8aa7a62a49cad53070b97e982bcf81abdce507fce147dbef74fa59103efb4414
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, designed to redirect users to external URLs. The embedded URL `https://soxebez.ru/strik?utm_term=how+to+use+rug+doctor+pro+home+depot` suggests a phishing or scam attempt, masquerading as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://soxebez.ru/strik?utm_term=how+to+use+rug+doctor+pro+home+depot PDF link annotation
    • http://ayazshabutdinov.club/lagu_adlani_rambe_seberkas_sinar_wapkafy6j1.pdfIn PDF document text
    • http://nesobaka9.xyz/rizopuzivefuxufisisat6n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426957/normal_604656e0cb843.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383132/normal_60240e23dfd98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501361/normal_6044755b8f785.pdfIn PDF document text
    • http://wegansit.space/74539742556tqg5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389074/normal_5ff042a943eb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447267/normal_5ffa77b9e43f5.pdfIn PDF document text
    • http://creamwalls.online/amerihealth_caritas_delaware_prior_authorization_form4dh94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490949/normal_5fde5a20aefe9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450140/normal_5ff290d97df1f.pdfIn PDF document text
    • http://eglo.club/the_lion_king_2_full_movie_google_drive4fh46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446917/normal_602f6bc524737.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/899f7168-8a6c-4567-90b1-df1e2b6008cc/ruzipamatepudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aab1f65-4c3f-498e-adb4-2b44241bbe15/98784233277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0987eada-69fb-40f1-83f0-9679e88f914e/58219470758.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eef1e9e2-40cf-482a-a842-23d5e1f8ee57/delonghi_ceramic_tower_heater_aldi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acd2d744-e16e-4575-a350-79c53ab126ff/collection_1_encounters_and_foundations_to_1800_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34471fbb-6d02-45c4-82cc-6c850c2ee888/pisilixixuperejo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13251922-fce2-486a-add6-4f13400a1eeb/craftsman_drill_press_chuck_removal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa19865-be79-481e-8430-1e6b5dcc1f6a/why_is_the_internet_light_off_on_my_router.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47a05283-480f-4fdc-96b0-44a12c26892a/canon_powershot_sx150_internal_battery.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_off0000fa8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8D 5296 bytes
SHA-256: 0dddebcb13b5da4da4079c46ed8d7948ec972eadc9e8a7d95bfd5fbd94860817
font_01_sfnt_off00010c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7C 11456 bytes
SHA-256: 573bb90db44e00d73e54ad11bf16fc0f69811a113af1735d6c6b5ba68f9dbf41