Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede8375c6fc55b73…

MALICIOUS

PDF

74.2 KB Created: 2021-03-18 15:30:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6b826c003467e9b87d9d23a58f51b709 SHA-1: 3b56b412be32a2b95aa9de2f10e75bf12e204cc9 SHA-256: ede8375c6fc55b7314a85e904b98d0a7512c33c56d7c5e675867b0b1f0514f68
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 0.9997

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
  • 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://seumenha.ru/wix?keyword=download+auto+repair+manuals PDF link annotation
    • http://juvizex.sportsontheweb.net/497791186.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402740/normal_5ff7cb3fba8b8.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/icjf0Xb/ballet_dancing_videos_youtube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426812/normal_601f195b31a59.pdfIn PDF document text
    • https://cdn.sqhk.co/jigidokasaga/eZd0gdn/15176006235.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/1IgzrEb/52077072344.pdfIn PDF document text
    • http://kiparegazeratax.getenjoyment.net/where_can_i_donate_baby_clothes_in_los_angeles.pdfIn PDF document text
    • https://cdn.sqhk.co/devepogisog/jGhbicU/497433512.pdfIn PDF document text
    • http://nemugub.mywebcommunity.org/counseling_skills_book.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/dmqZA6T/secret_codes_for_blood_moon_tycoon_2.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/jivasixuviligifasexapuna.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_efe9fb259b404d788b8fd765443e710d.pdf?index=trueIn PDF document text
    • https://78de399b-5cb1-4d05-8290-e7933402b20f.filesusr.com/ugd/10f998_a85c40f6a471477ebf12bfc273f8a37d.pdf?index=trueIn PDF document text
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_a807074925294a0ba2067e22b6597b32.pdf?index=trueIn PDF document text
    • http://sajulugebimisu.myartsonline.com/mega_construx_probuilder_masters_of_the_universe_castle_grayskull.pdfIn PDF document text
    • https://cf268418-7549-4780-9cff-e39e61b5276c.filesusr.com/ugd/0b1cf2_571d10c991e1481ba091169ddc3e1eb7.pdf?index=trueIn PDF document text
    • http://xekabotiwuker.atwebpages.com/rofogesezatixo.pdfIn PDF document text
    • https://044ec7df-721b-4788-b209-87474a3fcb06.filesusr.com/ugd/60ffa2_1b42a838a67740e38112df15138581bd.pdf?index=trueIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_b201f57a31d74f98b7a322170a933911.pdf?index=trueIn PDF document text
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_683323552a564fcaad53db74becc60a9.pdf?index=trueIn 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_off0000e1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E0 5196 bytes
SHA-256: a61721e5f2c9db0be0113ecd20b9431cdde10f0844bd25e8bf0a488c5a5223f3
font_01_sfnt_off0000f38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38D 11296 bytes
SHA-256: 16d76431829af5d0d18846a541d684d29cf95facc7558e2d938d88269bcff954