Malicious PDF — malware analysis report

Static analysis result for SHA-256 c64f0ce7638d0cc1…

MALICIOUS

PDF

79.9 KB Created: 2021-03-30 06:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 2110dc6e03559253f1fd2cb3feac78a8 SHA-1: 0d1996ab36bae510482661d72e7fc5edda30fbe7 SHA-256: c64f0ce7638d0cc13cbf6131a0a5d16605d4ba95b7c43992611bd5d54bded781
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm for SEO manipulation, often used to host phishing or malware. The presence of external URIs suggests the document's primary purpose is to redirect users to potentially harmful 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://maypoin.ru/wix?keyword=moen+vertical+spa+installation+guide PDF link annotation
    • http://vovodofozufora.iblogger.org/pinewomosagi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481067/normal_5fd32912ac3bd.pdfIn PDF document text
    • http://kafujaguvo.mygamesonline.org/busitenuwivuwoxigukixini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423166/normal_601ebf6390aa4.pdfIn PDF document text
    • http://xukosususif.medianewsonline.com/balance_sheet_format_as_per_companies_act_2020.pdfIn PDF document text
    • http://savineme.mywebcommunity.org/20999392611.pdfIn PDF document text
    • http://xomutukegadoj.mypressonline.com/nawos.pdfIn PDF document text
    • http://kagaromorin.medianewsonline.com/prepositions_nouns_phrases_exercises.pdfIn PDF document text
    • https://xezafeliwi.weebly.com/uploads/1/3/1/3/131381443/1283619.pdfIn PDF document text
    • https://sevisexabokiro.weebly.com/uploads/1/3/1/6/131637038/8109538.pdfIn PDF document text
    • http://saripituxupagek.sportsontheweb.net/product_game_board.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380082/normal_604f74c952446.pdfIn PDF document text
    • http://lorozetuwivu.medianewsonline.com/figosafafuviditofoxel.pdfIn PDF document text
    • http://bivaxosufuxibo.mygamesonline.org/woxobujivimukuradun.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://zimozowamewu.epizy.com/cricket_score_sheet_t20.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/les_coenzymes.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/limesurvey_email_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/nice_guidelines_paediatric_advanced_life_support.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_off0000e943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE943 5188 bytes
SHA-256: 19c11ecd760115df2811013160cdfaf4778a4de3ca9c9b9ddc4dd1b13c705150
font_01_sfnt_off0000fafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFB 11820 bytes
SHA-256: 261428e83b8bbca09d0d7c766eaed1516943ed5c21e52bc27f8062d7110f8ea6
font_02_sfnt_off000122dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122DD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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