Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fee912d452f7c7d…

MALICIOUS

PDF

74.9 KB Created: 2021-05-19 05:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 34b5a3acaba245f922bdf5b03b3c8217 SHA-1: 292d256cd5fa10b5a430fce1119a027c59dad5a1 SHA-256: 1fee912d452f7c7d0ae0b1001cf1ded9cd8764a0aed9e17ef28c678474811bd9
226 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though garbled, contains a lure related to fixing an Xbox 360 disc tray, aligning with the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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+fix+broken+xbox+360+disc+tray PDF link annotation
    • https://jozevupipe.weebly.com/uploads/1/3/5/3/135346753/7682018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487916/normal_602884da57af3.pdfIn PDF document text
    • https://wujuzuvetawi.weebly.com/uploads/1/3/1/3/131379059/wemam.pdfIn PDF document text
    • http://lusaxesa.iblogger.org/built_to_last_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378608/normal_5feed355b274e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479435/normal_60061c9792cf6.pdfIn PDF document text
    • https://tujebikofo.weebly.com/uploads/1/3/4/3/134359874/zipekogebulo_pulimezarivifok.pdfIn PDF document text
    • https://womominajarizu.weebly.com/uploads/1/3/5/3/135392323/c82fcfad609bdc.pdfIn PDF document text
    • http://buvofigutunam.22web.org/peter_abelard_ethical_writings.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nirutavikuda.epizy.com/microprocessor_and_microcontroller_viva_questions_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f21b64ff-fa20-49e6-a7eb-e7e09f3ca206/troy_bilt_mower_tb110_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f12430b5-934e-41f4-8357-aaf0c1eac0c2/asus_z97-a_compatible_m.2_ssd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28c6747e-a6c9-4ad0-ac91-36ac8c7f414b/kotesizixo.pdfIn PDF document text
    • http://gajiwudozu.epizy.com/zofawuwololerugami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45923d47-0d07-4486-8770-066ba54b9f1e/dixie_chopper_lawn_mower_parts_ebay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bd03171-740e-4cae-ab1a-aef38a28aaf7/what_time_do_stock_markets_open_robinhood.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82d6a394-9261-49e1-ac80-ceca950dc549/cambium_epmp_1000_default_username_and_password.pdfIn PDF document text
    • http://nenilezum.epizy.com/99175145034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ecca12-d509-4479-b155-1cc31614f955/toro_621e_carb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08282498-c280-4a80-a4ac-7d9fb2305c32/zafexakedaso.pdfIn PDF document text
    • http://kibulirol.rf.gd/jegelesurudininuvugenivip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/223f3a3e-db87-4ca3-b98f-5aad8fd34dc9/educational_psychology_masters_uk.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_off0000d900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD900 5660 bytes
SHA-256: b00c7c605a2b3a0c6c55927d9ed18126146fc98d5cdca3866245b5f8e4242ba7
font_01_sfnt_off0000ec5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5D 10488 bytes
SHA-256: 45f89e94967c1c6a583375d04c7b3639ebd294c01eda09c760f91a75bd656e65
font_02_sfnt_off0001100a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3