Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14013299aa385a6…

MALICIOUS

PDF

70.2 KB Created: 2021-06-10 14:37:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3b1f5e67bdcc59cc75327b7ed0451db9 SHA-1: 5078826359bdbb6ab1a649ae0bd65d4030918f5e SHA-256: e14013299aa385a609aa8187c8ed5a8d30928861d7264ee5605673f7fed9b094
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious and phishing-related. It contains an embedded URI pointing to 'nomylo.ru', which is likely the primary malicious destination. The document body, though heavily obfuscated, suggests a lure related to 'how to use pc as chromecast'. No scripts were extracted, but the presence of embedded URIs and the phishing heuristic indicate a likely attempt to redirect users to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://nomylo.ru/pbw?utm_term=how+to+use+pc+as+chromecast PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501193/normal_5fd772c6c3e17.pdfIn PDF document text
    • https://reboxulowewo.weebly.com/uploads/1/3/1/4/131407709/gijisajisedigi.pdfIn PDF document text
    • https://bejuzozomixur.weebly.com/uploads/1/3/5/9/135966319/88b51d0963b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376606/normal_6002c315c2d19.pdfIn PDF document text
    • https://kisisixixugejo.weebly.com/uploads/1/3/0/9/130969502/rovujifixolesinuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418584/normal_602d4deeb8e87.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4403413/normal_60b573af96db7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377109/normal_5ff15d7804fe2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414860/normal_5fdd3c9257618.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/8293317.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/48e140af-34ee-4399-9c9f-41c9ec8c1a4a/how_to_put_together_totally_bath_tension_pole_shower_caddy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6f51b68-2ff8-41e9-9e8f-6925fc3e0c02/troy_bilt_pony_lawn_tractor_blades.pdfIn PDF document text
    • http://fudejob.pbworks.com/w/file/fetch/144576954/flipkart_hack_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35bd5346-a351-4494-95f0-b631b73a1180/what_jobs_can_i_get_with_a_psychology_in_education_degree.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3554e17-0ed7-4c6f-aecb-37b289c7cb9b/sitefirojopipupekoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bbf8671-b663-4d10-a2a8-4f951b8e340c/dd_3.5_stronghold_builders_guide.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/w/file/fetch/144423093/dunagisaxokejopigix.pdfIn PDF document text
    • http://demogotujod.pbworks.com/f/rafi_biochemistry_3rd_edition_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/194a33da-06a5-430a-aa19-ecfa28cca42e/nakuvatesukof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1716b646-12ce-4855-8ca5-fb80767234a8/how_much_do_graphic_designers_make_in_california.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61F 5196 bytes
SHA-256: c0d2c9da39d4cd0005b1807b4ca2471d08530f63a03e3c78aaa46dc13e9457e2
font_01_sfnt_off0000e7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B0 10988 bytes
SHA-256: 4ae8305ffcd64598512015a72e42eb5d1ca2eea5775d138cc3dbee72609e5b6a

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