Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa5cb7e1ac20d12…

MALICIOUS

PDF

73.9 KB Created: 2021-06-15 11:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d053b2f2d084f749df86d554e519d8d9 SHA-1: ca6306d8192cfef8a9567b4f9af093625a18a697 SHA-256: 8aa5cb7e1ac20d1273534ff169ddbd8255049fd902f459c85df9300dff27113e
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing campaign. The primary URL, 'https://nomylo.ru/pbw?utm_term=download+movie+fast+and+furious+8+sub+indo', indicates a lure for downloading media. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent, likely to monetize traffic or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nomylo.ru/pbw?utm_term=download+movie+fast+and+furious+8+sub+indo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425491/normal_602c36b62f76d.pdfIn PDF document text
    • https://vugijivanapuxa.weebly.com/uploads/1/3/4/7/134742443/8c8a5a03e791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383699/normal_60109338dbcfa.pdfIn PDF document text
    • https://jugevubudi.weebly.com/uploads/1/3/4/5/134515938/wogajasud.pdfIn PDF document text
    • https://joxenawofin.weebly.com/uploads/1/3/4/3/134342561/dd98b3.pdfIn PDF document text
    • https://ruwaxejitoxa.weebly.com/uploads/1/3/4/9/134902813/cf3eb32.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/fb74c6a51a7b50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367301/normal_5ffd51972820e.pdfIn PDF document text
    • https://sokowerifali.weebly.com/uploads/1/3/6/0/136053586/9374716.pdfIn PDF document text
    • https://worivoka.weebly.com/uploads/1/3/4/5/134588103/nevafapix.pdfIn PDF document text
    • https://nowitijot.weebly.com/uploads/1/3/4/7/134716658/9235403.pdfIn PDF document text
    • https://lufufalab.weebly.com/uploads/1/3/4/6/134634403/sobadulabar.pdfIn PDF document text
    • https://manonerotorupu.weebly.com/uploads/1/3/4/6/134683358/fopad.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/165d836a-4ad5-4bea-a2ce-5800273e7f93/misotiwojerofuxipagevowon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd07b78c-0cc7-483e-9f31-a738641e7d67/jenerolosebafovewupuvim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0496fab6-934a-4cbf-9ca5-38af15727f08/yamaha_rx-v361_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ba0cd2b-05f8-4e01-b644-151469a78216/gafeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c62b125d-e37b-48fe-9488-05f4705a110a/how_to_get_rid_of_echo_on_plantronics_headset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/125a5678-03d3-44a4-9889-0a0b16c5c5af/how_to_read_ruud_model_numbers.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_off0000e12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12D 5536 bytes
SHA-256: 8aee36d1595436ad918ce0dd08f3d6ff9a0c1ed3155d8a7f0d178d6c2227e908
font_01_sfnt_off0000f40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40A 10616 bytes
SHA-256: b9d05653149c915fa9040c7a34119db75b92259d4dfea5a3f68a9f8ff0164fb2