Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a3fc510ff5636f4…

MALICIOUS

PDF

76.7 KB Created: 2021-03-23 22:50:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b2616cc0e37795e0864ae1928a1272c9 SHA-1: 93c9f57bb1368169020466fc6019edb0f72ffc68 SHA-256: 0a3fc510ff5636f40bc984676b1d1ec5638287655b7e74e93a71bc2654cf466b
156 Risk Score

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 0.9996

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 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://mezovuduw.ru/strik?utm_term=40+day+love+dare+fireproof+book+free+download PDF link annotation
    • https://cdn.sqhk.co/posojuvapono/c9MD3hP/98095333580.pdfIn PDF document text
    • http://classkaod.ru/64062387247ovjjj.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/nJghgib/86600431813.pdfIn PDF document text
    • http://firstdoctor.xyz/iced_green_tea_latte_starbucks_review2lk5d.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/jdTljir/wood_slice_shapes.pdfIn PDF document text
    • http://mebutef.22web.org/images_de_lorganisation_gareth_morgan.pdfIn PDF document text
    • http://mmamba.ru/26074284713me4rc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d7e981a8-8c4a-445e-aef0-60d3d4911bd2.filesusr.com/ugd/65d69c_a4d59b13ba024336ae5799054fbcfdb5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/28215375038.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/sojodoziwove.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/is_grade_12_physics_hard.pdfIn PDF document text
    • http://tagijonegularol.myartsonline.com/sufulolulonagalexefezisim.pdfIn PDF document text
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_1d6c08db8ee3467c93552e68035e1f7c.pdf?index=trueIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/85429135611.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/ways_to_be_wicked_song_free.pdfIn PDF document text
    • http://rebobimakefeli.epizy.com/types_of_structures_grade_8.pdfIn PDF document text
    • https://6a9ecc2b-05c3-4056-8705-773ae6be8cdd.filesusr.com/ugd/7a359d_3dd18ba2422841b7bc0c65d204a8270e.pdf?index=trueIn PDF document text
    • http://vumovofun.onlinewebshop.net/62727338890.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/jaws_sheet_music_boss.pdfIn PDF document text
    • http://ziwemasux.myartsonline.com/86403941718.pdfIn PDF document text
    • http://lazevemu.epizy.com/zejov.pdfIn PDF document text
    • http://parakotevetit.epizy.com/bohemian_rhapsody_ukulele.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE73 5452 bytes
SHA-256: fc563c2bdab77bf3cc1294de66eae9a139eff0a177050dbe5ae3ac9619e3261c
font_01_sfnt_off0001012a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012A 10532 bytes
SHA-256: 57079cfd59f62a9d06aae69eb2e34cae4070f6884815eaa97740b768aad57d5a

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