Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc0381a791b8c7d1…

MALICIOUS

PDF

78.1 KB Created: 2021-04-06 00:39:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d8c25ee6e388358e06837bb28409d927 SHA-1: a5f32572e1d6fa580ce2c15282078ccce3cf675b SHA-256: dc0381a791b8c7d1a63ae01f353f3bd55467fb75466226e88328a65929651dff
186 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 pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

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
  • 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://soxebez.ru/wix?keyword=emily+lejos+de+casa+pdf PDF link annotation
    • http://giwudogor.scienceontheweb.net/7554004573.pdfIn PDF document text
    • https://sovomebidug.weebly.com/uploads/1/3/1/3/131379042/a8dbfa7.pdfIn PDF document text
    • https://nosuzodudoj.weebly.com/uploads/1/3/4/5/134588086/gubavofuwoli-dazukekisu-nilade-deborojozadi.pdfIn PDF document text
    • http://kovativegapok.getenjoyment.net/the_secret_life_of_the_american_teenager_season_4_episode_13.pdfIn PDF document text
    • https://potegixizaw.weebly.com/uploads/1/3/4/5/134588155/bdfd4268.pdfIn PDF document text
    • https://woperuxotuxolo.weebly.com/uploads/1/3/4/8/134849923/ab79aaa1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495558/normal_60512a71630bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487906/normal_5ff4916aa1be1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_a93ad793df92440ab3e2e19c77dc02db.pdf?index=trueIn PDF document text
    • https://e6a48395-9ebc-465e-8505-c4b20d7b8e72.filesusr.com/ugd/81e12b_6982562b26574299bad8410d6ceaaab6.pdf?index=trueIn PDF document text
    • https://5902ff30-e651-486c-ac37-3e8383bfa78f.filesusr.com/ugd/f35da0_debd6ee848644dc38c5c40b78d881b5b.pdf?index=trueIn PDF document text
    • https://7c9e9c40-2b96-4f88-8065-b5ff5e495659.filesusr.com/ugd/3bfcae_c4569d08fe5e4f858ece89d1d30cc1c8.pdf?index=trueIn PDF document text
    • https://814cba0f-f649-4223-bfe6-7884e6e02b9d.filesusr.com/ugd/c1108c_711a34bec6204d96ab7604bb79cf6c5f.pdf?index=trueIn PDF document text
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_de0d26fe9571493fac618756b8720a56.pdf?index=trueIn PDF document text
    • https://d896c2b7-539c-4146-aa8a-b39d26e096d8.filesusr.com/ugd/a98ecc_fc41225b9e8b426181b7288da38d6e3f.pdf?index=trueIn PDF document text
    • https://d99c26cc-8c68-456d-a039-1a26994c8d26.filesusr.com/ugd/105a8c_f1d54794b4114c95a252661b7277bc63.pdf?index=trueIn PDF document text
    • http://namakanexir.atwebpages.com/bajomilunoxa.pdfIn PDF document text
    • https://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_f65b015ec7394cac84c8383ea22352a6.pdf?index=trueIn PDF document text
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_bcdab6c95557495fa2b8bf5bdeca2a66.pdf?index=trueIn PDF document text
    • https://1cd0d4d5-11d4-440c-a307-81f73801f601.filesusr.com/ugd/f0e51d_7d1c48ff89a84ebaa95248da9022480c.pdf?index=trueIn PDF document text
    • https://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_b28f5a737c6a4fa1992691ce44d3f60e.pdf?index=trueIn PDF document text
    • http://molagegivijoxu.onlinewebshop.net/how_to_use_mr_coffee_dehydrator.pdfIn PDF document text
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_145305e1e62f4eed8c3b397b2638da8d.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_off0000eff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF9 5340 bytes
SHA-256: 1e674a6ef3aa9562f662f0228345d5c9b666e7f8f112253ad9e009c3b5b5c6e4
font_01_sfnt_off0001022d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022D 12152 bytes
SHA-256: 72fa591982c498c4ce7790d8e67ccd67539d3226331d34d480797642ecd42bf7

Open this report in the interactive analyzer, or submit your own file for analysis.