Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9cfa6ee6687903…

MALICIOUS

PDF

67.2 KB Created: 2021-02-27 08:52:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c9c44d12dddad0c42bde92fc129dc1d5 SHA-1: 794de934a1d063bdea45fe96d907fa59fe8d0fee SHA-256: 6a9cfa6ee66879033fab834cca59eb7007b8347a9a643502106b571fe82267b0
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 hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, appears to contain keywords related to sales listings, suggesting a lure to trick users into visiting malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/123?utm_term=used+fender+rumble+100+for+sale PDF link annotation
    • http://artelamp.store/siwanesararafodajzzc.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/90923197057.pdfIn PDF document text
    • http://mutuvukawawe.22web.org/masamunixomebakod.pdfIn PDF document text
    • http://goodik.fun/77319625739fyok3.pdfIn PDF document text
    • http://lovepositions.info/firefox_browser_android_tablety9zei.pdfIn PDF document text
    • http://perevod24-card2card.site/definition_of_progressive_education_theory3qybt.pdfIn PDF document text
    • http://fevalugumaj.22web.org/el_significado_cuando_sueas_que_se_te_caen_los_dientes.pdfIn PDF document text
    • http://puliliraforuwu.22web.org/fatal_frame_ps2_guide.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/bruce_lee_greatest_movies.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/city_of_fallen_angels_audiobook_vk.pdfIn PDF document text
    • https://navojinalano.weebly.com/uploads/1/3/4/7/134755450/685134ab.pdfIn PDF document text
    • https://melesosinipedo.weebly.com/uploads/1/3/4/4/134475371/748587.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bitines.myartsonline.com/86628035618.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/13874823364.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/43258312702.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/tipos_de_temperamentos.pdfIn PDF document text
    • http://webidiwotew.epizy.com/gobododikufalidojubob.pdfIn PDF document text
    • http://padezaj.rf.gd/meet_your_spirit_guide_meditation_free.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_off0000c878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC878 5380 bytes
SHA-256: d66f9dc4250c22f24e3382dc51569bd52eda29b8383782d57b9dd4969ae65d8d
font_01_sfnt_off0000daac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAC 10800 bytes
SHA-256: f0ebcdb5d8ba86d8747bbb428e7d3ebc7bb4cd4c11c51be13698bf498ab73ad0

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