Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab6d26fbf757c635…

MALICIOUS

PDF

79.1 KB Created: 2021-04-04 20:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: cb9f4b9c2955eb166a281dab4b9de490 SHA-1: 8e88873dc68409a1795880a8c3fe52c994a7d0ac SHA-256: ab6d26fbf757c6356941d004e0726a66e719bdd26a0921af87adffa17377144f
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a high-confidence heuristic flagging it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of obfuscated content and external links suggests an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=marlin+-+60sb+19in+22+lr+stainless PDF link annotation
    • http://fesotisifofil.mygamesonline.org/nejuwep.pdfIn PDF document text
    • https://cdn.sqhk.co/sokaxopoje/gfhahi0/maze_runner_books_in_order_to_read.pdfIn PDF document text
    • https://cdn.sqhk.co/tesigasefaxe/giwWhck/41574090016.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/CojhPjq/league_of_stickman_2_sword_demon_apk_mod.pdfIn PDF document text
    • http://muvajopumo.22web.org/lesorobuwalidenokanigi.pdfIn PDF document text
    • http://tasiperop.medianewsonline.com/cade_simu_3._0.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/eJijTgg/kaiser_permanente_jobs_oregon.pdfIn PDF document text
    • http://xatarekinusafo.iblogger.org/tanazajanemedebefav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_36f067e9ee5f4c8ea380689f37433339.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/candlestick_charts_in_google_finance.pdfIn PDF document text
    • http://wugupur.epizy.com/muzemigozemaviluzimote.pdfIn PDF document text
    • http://kufekisawisewo.onlinewebshop.net/81581684393.pdfIn PDF document text
    • http://gazezubutajon.rf.gd/school_calendar_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/canada_states_map.pdfIn PDF document text
    • https://4590046d-f0a9-4171-b8a0-56ff8c1fe63c.filesusr.com/ugd/0bfb20_984a32eb79de42699a43a3578e84a91d.pdf?index=trueIn PDF document text
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_fecb08ea719249e18faea6f39f72ea8c.pdf?index=trueIn PDF document text
    • https://6f12065f-c45d-410c-b048-6ec23fb2b810.filesusr.com/ugd/02ccf7_f1c713b8ff414ab298eafd39cfde5be1.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_off0000f5be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BE 5492 bytes
SHA-256: 7edfae956f39fd3431ffea17c26421109e5b434a580dcea910c9e49d84a353c3
font_01_sfnt_off0001087d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087D 11088 bytes
SHA-256: 95fc068a8181d0021fc7d621c7c5df79f821f703866fd4eb465c56d60d277a06

Open this report in the interactive analyzer, or submit your own file for analysis.