Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a93bfd08c30c2e9…

MALICIOUS

PDF

130.4 KB Created: 2021-04-03 09:35:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: dbae7e1584987b7dae658670e2ef77e8 SHA-1: 5475e8ca42b263be6d4696aed601154efa052795 SHA-256: 6a93bfd08c30c2e93934b60af811b1dcb54caba9249a3034178c1abed88f33e1
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The primary malicious URL, https://lozipotod.ru/award?keyword=pisciculture+madagascar+pdf, is presented within the document body and is flagged as unknown reputation. ClamAV detection and ML classification strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/award?keyword=pisciculture+madagascar+pdf PDF link annotation
    • https://dananiruw.weebly.com/uploads/1/3/2/7/132741593/8771832.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404121/normal_5fcef84734e88.pdfIn PDF document text
    • https://cdn.sqhk.co/rogenujudita/jghgdLV/7397486712.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415930/normal_5fdc2341e6008.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485823/normal_603ead828c461.pdfIn PDF document text
    • https://munelexogetajax.weebly.com/uploads/1/3/1/4/131437313/bumixunepalawugob.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxazazul/GjeSXZh/kokigufetepikuranusafol.pdfIn PDF document text
    • https://repitosa.weebly.com/uploads/1/3/2/6/132681506/dawimavazim-wiwovi-ketuva.pdfIn PDF document text
    • https://rubebukani.weebly.com/uploads/1/3/0/7/130740450/e954a84acfe1.pdfIn PDF document text
    • https://cdn.sqhk.co/lipisedopila/jhKujjd/xuvolopedevurolanapubi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480749/normal_5fc59eb4bd263.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_6cde389720364da3ad304ec102282463.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/222404a3-181b-4a86-a2aa-3991ace41126/have_it_all_lyrics_cosmos_midnight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d751d63-d85d-422f-a922-2a42c99d101c/the_giver_chapters_1-5_quiz.pdfIn PDF document text
    • https://3c8d80e7-2998-4b53-b1db-ea2053e4eee2.filesusr.com/ugd/5c8c55_3521febb0a2545f180ccf11ef6ee2f7f.pdf?index=trueIn PDF document text
    • https://c63359c4-faa5-40af-ad11-254ddd3d100c.filesusr.com/ugd/838c33_003a1b7ac6964335b042d072ed42a53f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd79ccea-6ff6-4b55-be0d-9445f028d33b/what_does_fcc_mean_in_banking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eadfd90-ee21-4e8a-affb-d4ddcccf76e5/samosupiwuvejafovopop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17e9da37-2b06-48e0-abc9-92b8ef7c4e97/41639837752.pdfIn PDF document text
    • https://6db1e9a2-4282-4636-8d41-de07325ad911.filesusr.com/ugd/d97b38_e6da52f0d583451cab8ebc8dc8156f4e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1172ed15-f6cb-42f8-b49c-5f3a30e90ac4/11323393784.pdfIn PDF document text
    • https://78a3f932-2eca-4366-91b9-d52a2f3c5f58.filesusr.com/ugd/a586f9_d8d4626d7c9d47b89d6f7121b2f005c5.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9E2 5476 bytes
SHA-256: ff50d1aeb2d086dfdf0e8d3a33a1c5582d5cc222e0724ece952cd7e00507eb6d
font_01_sfnt_off0001bc6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC6E 12888 bytes
SHA-256: f5f559a26d3961ec2e5d47bd0e214781466c1dbe3a96c1ed3e4cb4db8816b9a8
font_02_sfnt_off0001e48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E48F 16232 bytes
SHA-256: 59d745c037c048a9723e1fc9762b47e4121f695a31a6557d2afbee09d2acc10c