Malicious PDF — malware analysis report

Static analysis result for SHA-256 087b61e6cb4b7d38…

MALICIOUS

PDF

74.7 KB Created: 2021-03-12 16:42:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5dc6aea0b9daa193e6038190a86f8713 SHA-1: 15af98eadb1da2fb14d1f1e7cf898148b7e1b3b8 SHA-256: 087b61e6cb4b7d388ede7e65d7f8d8cf153efb9e6bcfd8322ef39bc1e82d2278
166 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. It uses a password-protected-archive lure. 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 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://botokaw.ru/strik?utm_term=arris+tg862+factory+reset PDF link annotation
    • https://cdn.sqhk.co/rivinodati/hsYmjb5/lofikiworadokexa.pdfIn PDF document text
    • http://comforfemj.fun/chrome_for_pc_32_bit_2018u53uk.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/88281911828.pdfIn PDF document text
    • http://the-glow.ru/bluffton_university_baseball_field8penp.pdfIn PDF document text
    • http://kejoxemubogese.mywebcommunity.org/dell_latitude_e6430_specs_i7.pdfIn PDF document text
    • http://sufawevugut.mywebcommunity.org/ladutudivamobedafojemu.pdfIn PDF document text
    • http://profit-makers.club/the_perfect_stranger_book_synopsisaieid.pdfIn PDF document text
    • https://cdn.sqhk.co/komagiju/jaicgfx/stick_warriors_shadow_of_legends_mod_unlimited_money.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/gofiguj/petukolokazotabusasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e364a48-7897-4e3a-9501-3fbb40c6ac70/gibugufodagusumelifil.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/33815474763.pdfIn PDF document text
    • http://badamowafe.onlinewebshop.net/63798817305.pdfIn PDF document text
    • https://a8a57b57-a5e9-4b5c-b824-02731ce3a1bd.filesusr.com/ugd/cfa667_266fe5214e9d459eae44246c0fef3127.pdf?index=trueIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_1f18cc3966de43868c150e4ec37145e0.pdf?index=trueIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_9ccab88cd83945febfa1db8d61a55982.pdf?index=trueIn PDF document text
    • https://ce722411-b424-48ee-ac00-b4ed8818edd9.filesusr.com/ugd/bff0de_33bc8e8b05854992824ed58947c77fc8.pdf?index=trueIn PDF document text
    • https://f3dcd8e3-6656-4b47-a81e-a993d3c4f2a1.filesusr.com/ugd/aa9ef2_5e70de8f5a2e46df97b8706a8b7cc911.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe757e35-9a36-4498-b3ab-3a9e33f6de1a/dungeons_and_dragons_campaign_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/bismillah_kijiye_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/58726401141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/532dd59b-887f-4cec-81fc-963a4f25f0e3/lowrance_hds_5_gen_2_side_imaging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2feb2b9-a588-4454-92c5-a8668b5130ee/17276520094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5733e744-1c06-444c-90f9-81f94bbe71ad/dunkin_donuts_turkey_sausage_egg_and_cheese_croissant_calories.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_off0000e6ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CE 5588 bytes
SHA-256: 521b41364da826bced32cf9802ea0125c66def6cdf4655e0b616256620bc7afd
font_01_sfnt_off0000f9f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F7 10336 bytes
SHA-256: cb9e4255c0cef642b595da3628bf23b92fbe6be78dc06eead14a4690a36e3643