Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c22ceaa749aff17…

MALICIOUS

PDF

79.3 KB Created: 2021-03-15 18:25:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ce7e3fb1b73126bb57e63b8078a55e69 SHA-1: 10e9dd61cc79389f8bda0b6b1c7645a8a108922b SHA-256: 1c22ceaa749aff17920ab20f5b045a82f1b8564d47b3d63c0ea18718690e480a
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://baarspo.ru/strik?utm_term=what+does+the+color+emerald+green+represent PDF link annotation
    • http://natbeach.space/95537014495wp84t.pdfIn PDF document text
    • http://mscgis.net/tales_from_the_loop_season_1_episode_3_musicoyz8p.pdfIn PDF document text
    • http://kurs1.xyz/glass_sword_chapter_8eqjms.pdfIn PDF document text
    • https://niraniki.weebly.com/uploads/1/3/4/6/134662237/mazanalenakim-livufovawep-silami-kukaxogizamum.pdfIn PDF document text
    • https://tisawotaw.weebly.com/uploads/1/3/5/9/135993845/2894413.pdfIn PDF document text
    • https://pimumurex.weebly.com/uploads/1/3/6/0/136027953/5867134.pdfIn PDF document text
    • http://beach-fruit.fun/manual_de_serigrafiaek8pg.pdfIn PDF document text
    • https://tizevilujiv.weebly.com/uploads/1/3/1/4/131406709/ac2656.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426686/normal_5ffaeb22b012f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_5fd1641f94470.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/tanederefovodudojcl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486775/normal_6001d85f02fcd.pdfIn PDF document text
    • https://romugazasemagop.weebly.com/uploads/1/3/4/8/134897733/9d4f92a6160e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481839/normal_5fca9ae56f165.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://letugupinuvanu.rf.gd/89092478834.pdfIn PDF document text
    • http://misukejijixuke.epizy.com/76700882556.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/rovibubekem.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/b_a_c_k_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/dazawadosolexezor.pdfIn PDF document text
    • http://wotikuvejuf.rf.gd/clasificacion_de_los_derechos_humanos_segun_su_generacion.pdfIn PDF document text
    • http://lopumupukerodu.epizy.com/ritowifolekulurawagedu.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/react_native_stylesheet_props.pdfIn PDF document text
    • http://juxudawalugevop.epizy.com/converting_fractions_decimals_percents_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/chi_health_council_bluffs_mammogram.pdfIn PDF document text
    • http://witeguxatuzidaj.epizy.com/pamavebi.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_off0000f466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF466 5500 bytes
SHA-256: db40bd808e86a663864588442f223ee4b3ae0be50b929d7536a6637fc8993f2b
font_01_sfnt_off00010700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10700 11388 bytes
SHA-256: aa5db3501f8f30372636aa27f599595cc8d3a82c50745d6a820099b5c5b272ae

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