Malicious PDF — malware analysis report

Static analysis result for SHA-256 70bb598457b07627…

MALICIOUS

PDF

93.9 KB Created: 2021-04-01 13:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d6440c3b7382ad2f2723837338b55996 SHA-1: 6d470bcbbf6680d6d9982a6c424fb1767527089b SHA-256: 70bb598457b0762724b8f4837ba493e4f2028ea5469c4c6c01a197d091d9a1d8
186 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is part of a link farm designed to redirect users to external sites. One prominent URL, 'https://ponafet.ru/strik?utm_term=halo+2+startup.exe+fix', suggests a lure to download an executable disguised as a game fix. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://ponafet.ru/strik?utm_term=halo+2+startup.exe+fix PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4498983/normal_5fc7a38a0f3b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408598/normal_5ffca5747e894.pdfIn PDF document text
    • https://xemizumelisiga.weebly.com/uploads/1/3/1/8/131856695/1275992.pdfIn PDF document text
    • http://cartest.pro/campbell_hausfeld_3_4_hp_airless_paint_sprayer_manualpdw3q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490720/normal_6024eea13af23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375073/normal_5fd8bb9f92679.pdfIn PDF document text
    • http://characduwe.space/dragon_prince_elf_name_generator8ka1d.pdfIn PDF document text
    • https://nifusesoporiw.weebly.com/uploads/1/3/5/3/135309858/377163.pdfIn PDF document text
    • https://sugibovipebu.weebly.com/uploads/1/3/4/7/134705953/xewilujakivuvamavomi.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
    • https://uploads.strikinglycdn.com/files/e86af977-928d-4e28-af3a-b548abeddb09/94388379083.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/speak_now_2_student_book_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05eb04b2-5ebe-4ce6-aea1-f7c802b4b942/teaching_to_transgress_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9214205f-5538-4681-b73e-c911d5a1e498/28186040171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac230596-2280-4ce0-aa30-35719ce58875/ovids_metamorphoses_daedalus_and_icarus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da3195db-be80-4442-95b7-2778bc140aa9/44946981827.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/meaning_of_vocational_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fa301cb-e2e6-4323-83d0-46ffbf207036/mewajamitegokam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c294a1f-865b-4001-93eb-a76eae620786/acurite_rain_gauge_calibration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c970a4c-cfa7-4560-97c4-0a7100264037/werolagaxuwitotujip.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/cash_receipt_form_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f65135d-7cea-473c-bfec-bf381bde57ac/dakelazozitilasamisetut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea8caaed-650a-42d8-9023-422eb6faf650/3643381710.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/my_family_worksheet_for_class_2.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/2019_ap_environmental_science_free_response_answers.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_off000122a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A5 4864 bytes
SHA-256: b6c908a5181da49fb081c58093f2d07831c714c5aa48088276f9f7a5b701b741
font_01_sfnt_off0001334f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1334F 12036 bytes
SHA-256: a3a5b741adbd5b97e09eb83cfb50c10a8c62698e14dad79a8a372b7d2ffb5385
font_02_sfnt_off00015c42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C42 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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