Malicious PDF — malware analysis report

Static analysis result for SHA-256 6019cdfd9179188c…

MALICIOUS

PDF

79.4 KB Created: 2021-03-09 11:33:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 37ec798aab3a7b08546ebe99263b26bd SHA-1: c40c3d75033d92520f18f699c376e3f417543499 SHA-256: 6019cdfd9179188c232e034c8b2fe227c6a47d5b8cc658d4ea62dbd1940d71f6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://gimoguvi.ru/award?keyword=different+camera+angles+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4389586/normal_5ff0d22e380a6.pdfIn PDF document text
    • http://kurepez.22web.org/what_is_newtons_2nd_law_examples.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367916/normal_600f21278bdb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472182/normal_6043722992f74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495265/normal_60183843a00d7.pdfIn PDF document text
    • http://kugiriteno.iblogger.org/fannie_mae_underwriting_guidelines_earnest_money.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_0f9a3756a5954af9bd44094f280b71f4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/banavizopugopa.pdfIn PDF document text
    • http://dipuvomefig.epizy.com/turkish_to_english_translation_worksheets.pdfIn PDF document text
    • http://nefigubisi.epizy.com/kabali_tamil_full_movie_free_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/marriage_annulment_in_the_catholic_church.pdfIn PDF document text
    • http://gexepitirunagu.rf.gd/magonigoxiwilekusi.pdfIn PDF document text
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_63800a9023ad4949ab7b46c957886352.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/monasetexejemidibozadase.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/8606284524.pdfIn PDF document text
    • http://kevazot.epizy.com/lukaroron.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/reddit_maplestory_2_fishing_guide.pdfIn PDF document text
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_9c0869f513024a998c74032c446f51c0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/musokejixami/panarawegenibedakexesu.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/armitron_pro_sport_wr_165_ft_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/antasida_doen.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/68854400564.pdfIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_5efb53734af34d8baac7b1fb1d30110d.pdf?index=trueIn PDF document text
    • http://wajiletum.epizy.com/jefexanasojolajanovix.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/fugujoworiw.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_off0000fa21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA21 5476 bytes
SHA-256: 5d2fcfc4375e443c1a4eb473f41f9788c606a760494c29cc31ec4fdd19952924
font_01_sfnt_off00010cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB5 10240 bytes
SHA-256: 2b3bde72006ba0b153e4155325fb6be093914941721752b45e24e0971e135c9d

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