Malicious PDF — malware analysis report

Static analysis result for SHA-256 e82f6ed3da4ad1c1…

MALICIOUS

PDF

127.6 KB Created: 2021-03-23 08:32:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bca15019592d49ef9797446b5e70d10d SHA-1: 549c4100b9676e662d9f6f4298e5d7b216dfcfcc SHA-256: e82f6ed3da4ad1c137b840c29e6fc0317b82c57bb9eb53eea20c873b75bd7f7a
186 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 0.9994

Heuristics 6

  • 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.
  • 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://resalured.ru/123?utm_term=baahubali+movie+telugu+free PDF link annotation
    • http://iwhite.space/jared_kushner_peace_plandf50l.pdfIn PDF document text
    • http://albl.ru/art_fundamentals_book_free_download8xl4n.pdfIn PDF document text
    • https://xevefozivoro.weebly.com/uploads/1/3/5/3/135339272/b7312.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488135/normal_601a99bf3d9e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370778/normal_5fdb2769c527e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452618/normal_6039d43ddd79b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403560/normal_5fe7882365deb.pdfIn PDF document text
    • https://bufopavebusi.weebly.com/uploads/1/3/4/8/134853568/fbee5bef.pdfIn PDF document text
    • https://lifoluzasodani.weebly.com/uploads/1/3/1/4/131437418/naxopiguvune_julalekegus.pdfIn PDF document text
    • https://pazudafodimaje.weebly.com/uploads/1/3/0/7/130776249/nexotikuvat.pdfIn PDF document text
    • http://icily.xyz/fishing_tour_guide_salary8detu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d52e8c4-983d-4b36-b754-25fe59c1ad37/vapelup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a79a662a-6ca2-433e-9f8f-e4471bec7419/emerson_tv_lc320em2_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8295da6b-c257-4849-a33f-a8021b640bcc/how_to_connect_your_bluetooth_earbuds_to_your_ps4.pdfIn PDF document text
    • http://gakupoxefale.epizy.com/bubuzoj.pdfIn PDF document text
    • http://tixumupugenatum.epizy.com/19961787066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15e1e8d1-d745-454c-b66d-d1570fbb9f3a/66159218353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bc6c710-daa1-48a6-9306-8c602303d02b/2020_sexiest_man_alive_runner_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8203fd1f-2de7-4828-b510-165f00e63594/best_spiral_math_curriculum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/803fc288-ed5d-4578-a3df-79fdf2e56b10/dias_festivos_en_los_estados_unidos.pdfIn PDF document text
    • http://bamoxopigodarok.epizy.com/tujisasedowisowalomopiden.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18674 7184 bytes
SHA-256: 34b9ae461f81cec511b5c8c3af9872686568a3e7a6367abb5d1cc21f6127cddc
font_01_sfnt_off00019eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19EB6 5252 bytes
SHA-256: 651edd5d81b89b2f5084fa85ee4057930d2a15d68c5728a64ce227ae1346f29f
font_02_sfnt_off0001b07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B07C 13164 bytes
SHA-256: fb064f8de82878085fc038f3f1c87d47a9ffc1ebffc2bafb094cdac80b2aeaef
font_03_sfnt_off0001db5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB5D 16164 bytes
SHA-256: ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1