Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e414de6ebc3b1f…

MALICIOUS

PDF

86.3 KB Created: 2021-03-05 22:38:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 46627aa2d21ae292ef4f6614d881b8a2 SHA-1: b65f91c7d6fa10f5aa48b8d11f28d4b26f8fb361 SHA-256: d0e414de6ebc3b1f76d713d8b16993157aa5eabd94ac88f6b90a61dc95bc3047
126 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of numerous external links suggests an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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://bologen.ru/wix?keyword=how+to+replace+a+fuse+in+a+ge+dual+wave+ii+microwave+system PDF link annotation
    • https://rokajovata.weebly.com/uploads/1/3/4/3/134376264/7935995.pdfIn PDF document text
    • https://gegoviboz.weebly.com/uploads/1/3/4/8/134876631/d348f08.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/a9e41f11.pdfIn PDF document text
    • https://fenikazegalo.weebly.com/uploads/1/3/1/3/131379965/8286415.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391903/normal_5fc9acc39dab7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455194/normal_5ff16ce9e546c.pdfIn PDF document text
    • https://piziwola.weebly.com/uploads/1/3/1/3/131382430/bopikufolun.pdfIn PDF document text
    • https://nolutoxut.weebly.com/uploads/1/3/4/6/134683805/83db324b23.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/271095f2-ae26-4857-a89c-49d620e6d258/sears_front_tine_tiller_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0530dc85-5fbf-4b97-9991-033d912c0f31/how_to_edit_vertical_video_imovie_on_iphone.pdfIn PDF document text
    • https://ff06b2c9-6223-4357-b4d5-1bf3807c749f.filesusr.com/ugd/717131_4a3c39d7615e4e65bceb8a70f4eb379b.pdf?index=trueIn PDF document text
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_0251277c4b9a489aabb5cdad4edac60f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6259a9f-aa0f-428e-a4ef-cd22883c3a55/girl_jamaica_kincaid_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03027266-ba36-4c69-a99c-bcd3262d279f/94804944381.pdfIn PDF document text
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_19621eef6db149ca8dfed4e5580b276c.pdf?index=trueIn PDF document text
    • https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_2f4b8c16f631454986f0ee231c4afb0e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0007ba7e-cf3b-4bc9-81f5-20b1e229c6a3/bawev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25cad9bb-c20a-4705-ae2d-479408cc798f/tactics_ogre_let_us_cling_together_best_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0323a131-8278-4288-ba3d-d1b612b9fb05/10025430275.pdfIn PDF document text
    • https://7f793f8f-877f-420e-851b-8bae9ea62a4d.filesusr.com/ugd/78c764_9858bd924853441e83ac0fcfc4d1f1de.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011123.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11123 23216 bytes
SHA-256: 735e04d285007e137ecc01d7dcbd9eab9979c599df9ffc35f2e22d653968c3c2
font_00_sfnt_off0000db51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB51 5572 bytes
SHA-256: 4c0245bec31b412f08e7543fc5ada5e82affdd5aa35394750082584419ab4bc1
font_01_sfnt_off0000ee45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE45 10204 bytes
SHA-256: 394c7c33019f186e6626eee99cae2899d245d2ef2ca3bba51de2c5d4da1a4992
font_03_sfnt_off00013a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A0D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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