Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e45eaf70c72eaff…

MALICIOUS

PDF

82.6 KB Created: 2021-04-07 23:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 54caade7141a9a6cf71440c9a8b9ab86 SHA-1: 2fcd166ec794be699e720324ec6986cfd363c6cb SHA-256: 0e45eaf70c72eaff2df421bbdf8aa1669ff10390730cac53887232d928b1a404
134 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and a heuristic firing for a 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further supports a lure-based attack. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/strik?utm_term=how+to+prime+a+pentair+sta-rite+pump PDF link annotation
    • http://ukranews.site/rescue_cut_rope_puzzler068q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447434/normal_601f8e4b075e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497131/normal_6026fca453c96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451574/normal_603f0cb6ac3d9.pdfIn PDF document text
    • http://nuwenipo.22web.org/psychodynamic_approach_to_leadership.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475559/normal_604ab5f124acc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379359/normal_60601770d1736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404514/normal_5fd3766ec63c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454280/normal_6055c03fb0b97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_6026dd88357e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381090/normal_5ff51a46eb0aa.pdfIn PDF document text
    • http://cadenalia.com/12771182130brk5f.pdfIn PDF document text
    • http://kuroramogesok.iblogger.org/between_the_sheets_cocktail_receta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gevuwipa.rf.gd/44950441822.pdfIn PDF document text
    • http://dujepuxa.rf.gd/gowizebijegi.pdfIn PDF document text
    • http://zenoridofagokev.epizy.com/warrior_cats_kittypet_name_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd378e98-e6e9-4ab4-99c7-21c3acaef26a/movixodubigokaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6eb9c41-a1f9-4ba9-bd7f-775ed85db482/sujaropalot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5e6c8a6-af11-4848-81f0-af9b2624d422/99034115400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c46fce8e-a87a-4a46-87c7-d19a336aa0f8/radio_shack_weather_radio_manual_12-262.pdfIn PDF document text
    • http://wuxojawe.epizy.com/what_is_maslows_theory_of_self_actualization.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05695aec-e091-46e9-83d7-d832c97c635a/john_deere_d140_belt_replacement.pdfIn PDF document text
    • http://valopuloti.rf.gd/46532454764.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_off000102d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D4 5016 bytes
SHA-256: 69b9731aaa159d20a5399285ed1c99153eedd5675a626a453959510fbafe7706
font_01_sfnt_off000113de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DE 12036 bytes
SHA-256: 9c158462809ddcab638412f717187f668ef48e46147cbeee0c8ce351b3b7e8bd

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