Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba15dce3daf702f7…

MALICIOUS

PDF

138.5 KB Created: 2021-03-27 21:33:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1135fd2e0d6a2cbb6f3426df0343b6e1 SHA-1: 1527499a8508a6600e5fe6704f8db62990b0c072 SHA-256: ba15dce3daf702f794dc4b06e27e3f4b114aa8a98ffe06e5904cfe60fba6defe
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://xajibur.ru/123?utm_term=allen+bradley+powerflex+40+installation+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485310/normal_601f0efdc2eb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469103/normal_600d0c6cb5459.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377371/normal_5ff0eb66680d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462376/normal_60585f91a363c.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/togabolafepogawel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454056/normal_602f7d124e411.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489429/normal_604f64fe1969c.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/jumping_jacks_play_area.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472185/normal_60560071986ac.pdfIn PDF document text
    • http://gonifarej.mywebcommunity.org/what_is_the_theme_of_on_the_sidewalk_bleeding.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/46a8cc55-f80a-4765-ae5c-12007d29fa8c/energy_soundbar_codes_for_comcast_remote.pdfIn PDF document text
    • http://kemesid.onlinewebshop.net/poviruvogibibavujiluzuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bab02398-8ce1-4504-820c-2dd38f12a927/how_to_filter_deep_fryer_oil.pdfIn PDF document text
    • http://jokubamobivavum.onlinewebshop.net/21375174494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96940c64-cf7d-475a-ad70-53b498cf0541/what_is_child_directed_play.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d18cad07-b867-462e-90e3-599943e6acba/62000974989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f4d52d-65dd-492b-99e3-13fdbfa6a330/43398861189.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0725a3a8-3cd5-4392-9976-5c05a768fff3/43596472459.pdfIn PDF document text
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_4e53831615b74fe5a88c1ffedc0de227.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba8664b9-076c-407f-b674-04a3b2767908/teorema_de_demoivre_laplace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66134651-45c2-4e38-ac91-e54f88bdf5d8/how_much_is_brandon_sanderson_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24d7b9ef-0ee4-4e82-bb72-2645a7691240/red_rising_pierce_brown_movie.pdfIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_f60487417b9a43ee972e321dd6298756.pdf?index=trueIn PDF document text
    • https://e8b83640-91e4-44a0-a69f-c2468797902f.filesusr.com/ugd/ee4a13_538b9540151d4939a5cfad997f64f06f.pdf?index=trueIn PDF document text
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_d5d0726ed80e4ec89e85855a9f64be22.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_off0001c2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C2A7 5808 bytes
SHA-256: ff34f66045408465771f39aec91c63ff486faf8a6aaac581344e8cc8f2aa5fa0
font_01_sfnt_off0001d673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D673 12836 bytes
SHA-256: 56f2db0e39b573771d0cfbc476492fe7fe67a4a10e29ee3f308ca6782d2b700c
font_02_sfnt_off00020223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20223 18048 bytes
SHA-256: aae533c572cebc636dc03aadd497f82ac25ae30d24ec1ee69dd37e6690c5f041