Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3b7a6a47a15adb1…

MALICIOUS

PDF

87.4 KB Created: 2021-03-28 14:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0d1f3e6f9b352e825d0e744f20dd578e SHA-1: ecf42a8e653ce4b59ed15197761d42a335eb058d SHA-256: e3b7a6a47a15adb1361ed3395e1ff42d82c4516a86a68928fb7539cebd350c84
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains references to 'Photoshop action software free', indicating a lure to attract users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://botokaw.ru/123?utm_term=photoshop+action+software+free PDF link annotation
    • https://wizenavadabavor.weebly.com/uploads/1/3/4/5/134518239/4182420.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_601c7a7b22e0d.pdfIn PDF document text
    • https://sefedajexoxoj.weebly.com/uploads/1/3/4/4/134479396/7bb0566.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492900/normal_6029454f43b68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375083/normal_5fe9a86ea56f9.pdfIn PDF document text
    • https://lazofakivew.weebly.com/uploads/1/3/1/4/131406449/patozosamenad.pdfIn PDF document text
    • https://ruwijupoxotafan.weebly.com/uploads/1/3/0/8/130814308/01d7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405206/normal_5fe0205de8697.pdfIn PDF document text
    • http://a1metromovers.com/naruto_3_in_1_volume_17t7csp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424682/normal_5feba8ef92925.pdfIn PDF document text
    • http://aduo5.online/64311865647ljqy3.pdfIn PDF document text
    • http://iuts.space/how_to_adjust_2_stroke_engine_carburetorlrg4x.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://f8e303d0-f350-43d2-b7c3-f886ef13ec25.filesusr.com/ugd/1bb397_b70cf4c323ec47229737126384eb63d9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/434d68d2-f605-4297-9071-ea665f8d4888/2736572788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b1c1c2f-e0e2-453b-93b2-91b2212497ac/lafemal.pdfIn PDF document text
    • https://ebcfae26-b4e4-4f1a-a5b2-c5bdbddc1bdf.filesusr.com/ugd/259f90_c755681fa8054c548caeeb94b57a5f7e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/054ef6f7-f0a5-46ff-ba42-5bc273b2ece4/legipefolofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a971a13-d3a2-4616-8d20-0f29f2dc47c3/jaxuwubabidevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/182ba952-63e5-4062-a497-e004704645ca/mewerebiwa.pdfIn PDF document text
    • https://4f6c49ad-35c2-4e1b-a50e-a4ca4816ee30.filesusr.com/ugd/a28dad_8e372bc7c7f34bca87c4f9dd4ce9854f.pdf?index=trueIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_a4134209176345f08ec28383f2361769.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc39b453-2d4a-466c-80e3-29ef5e225486/gagiz.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCF 4952 bytes
SHA-256: 30d1e7fbbc0d2346f466ba0a56008896a370fa212ee1ad7b4cc07ef5f26093c2
font_01_sfnt_off00011da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA4 10648 bytes
SHA-256: 8007c9fe737885e160d26b1d874a58eac2e7dc25bc47bf7b62977fa7d9519f9b
font_02_sfnt_off00014221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14221 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176