Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc69cc080f78019…

MALICIOUS

PDF

78.0 KB Created: 2021-04-06 18:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e326a66e42bc909a35d324c68a9a9ee6 SHA-1: 9023b639188bb8b2d27dea5b7b997b8c186e338a SHA-256: 1fc69cc080f7801930a6418ff498d993813059fcf45523586a28ec15a283b1f5
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to other PDF files, suggesting a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly indicate maliciousness, likely phishing or malware distribution. The embedded URLs and the document body's deceptive content support the attack pattern of luring users to download further malicious 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 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.
  • 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://resalured.ru/award?keyword=yesterday+tamil+news+paper+pdf+download PDF link annotation
    • http://gezakiribonenin.mywebcommunity.org/2793211560.pdfIn PDF document text
    • https://gizazegixewaner.weebly.com/uploads/1/3/4/5/134596748/f9d7d453d0a4f.pdfIn PDF document text
    • http://gagapazu.scienceontheweb.net/achievement_motivation_profile.pdfIn PDF document text
    • http://fagogit.sportsontheweb.net/62230116928.pdfIn PDF document text
    • https://fajizaxaro.weebly.com/uploads/1/3/1/3/131381717/5e591f97c.pdfIn PDF document text
    • https://zivejopoji.weebly.com/uploads/1/3/4/2/134266783/c2253dfd598f.pdfIn PDF document text
    • http://pawomodom.medianewsonline.com/65762309889.pdfIn PDF document text
    • http://banademebilite.sportsontheweb.net/sex_and_the_city_alternate_series_finale_endings.pdfIn PDF document text
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/1465531.pdfIn PDF document text
    • https://sajogosekatoja.weebly.com/uploads/1/3/4/6/134682383/3419314.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tutasujal/spring_waltz_chopin_piano_sheet_music.pdfIn PDF document text
    • http://zarilapaserit.rf.gd/rologaruwuretuvareregufo.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/lofupetuzodofiro.pdfIn PDF document text
    • http://wewamamewiler.atwebpages.com/small_download_cracked.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/dslr_camera_starter_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/66734125409.pdfIn PDF document text
    • http://zagofij.onlinewebshop.net/91217727038.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/43213145536.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/photoshop_tutorial_change_picture_background.pdfIn PDF document text
    • http://devuzobek.rf.gd/eu4_centre_of_reformation.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/kujuvijulifaxus.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/sizesofibawa.pdfIn PDF document text
    • http://fukuselumetu.myartsonline.com/15937403536.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_off0000f448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF448 5344 bytes
SHA-256: 17e043cf0b731fe1c93d7eeb74edde7cbd67d16764c42f723f6257234aafedf3
font_01_sfnt_off00010679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10679 10492 bytes
SHA-256: 69cd2044b4588218f2433f9921d08acc62d3a10d8936c7fc7151c2e5dc3ef99b

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