Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa1b1f98488ac66…

MALICIOUS

PDF

74.4 KB Created: 2021-03-28 21:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7932b4bde8fa4e070bc8ec4965a00d84 SHA-1: b03642a7b15614602a268a82436582bb149ed2e9 SHA-256: 9fa1b1f98488ac668619668e85a67e3df7958230e60a2701d812ead422b0d597
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://xezojetit.ru/award?keyword=pdf+to+word+converter+online+for+free+to+editing PDF link annotation
    • https://cdn.sqhk.co/libobivole/ZjfBGhj/matrix_ost_youtube.pdfIn PDF document text
    • http://fofumumitem.medianewsonline.com/calculus_and_vectors_textbook_nelson.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/ahckvF8/talking_tom_cat_apk_mod.pdfIn PDF document text
    • http://my-favshopf.online/nufumikilu5w2c1.pdfIn PDF document text
    • http://farunoraxukiz.getenjoyment.net/materi_biologi_sma.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/ijjjsDK/9_planets_in_our_solar_system_images.pdfIn PDF document text
    • http://inostrana.com/what_is_gods_concept_of_creationjbw8c.pdfIn PDF document text
    • http://gojevomarokabe.getenjoyment.net/preguntas_sin_auxiliares_en_ingles.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/55703300175.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/91223291270.pdfIn PDF document text
    • https://f9fc249e-2e6a-4908-9eb0-88005465a50d.filesusr.com/ugd/2530ee_f936c87f89d047d4a4554508bfe1b42d.pdf?index=trueIn PDF document text
    • https://0793e221-2e7e-4176-aae8-4ff4b75d8f7a.filesusr.com/ugd/64bd79_4a7a33079cd54672a8d92c96ccc2ba22.pdf?index=trueIn PDF document text
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_10647122956849cc8ec2402bbc19bf15.pdf?index=trueIn PDF document text
    • http://zejusamipokera.myartsonline.com/human_trafficking_prevention_methods.pdfIn PDF document text
    • https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_39434136d76e472ea887e99e137cf529.pdf?index=trueIn PDF document text
    • https://a0f88182-e1f9-4a9c-ba22-d5ce004c6985.filesusr.com/ugd/2f3216_96c0c5eae1ba4cad90ad62371817d101.pdf?index=trueIn PDF document text
    • https://78fc25e8-d533-4ec3-a480-3617e8cc0d4b.filesusr.com/ugd/aa5866_c1d8779a752642b1a9c71bc39bfbaa60.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE740 4956 bytes
SHA-256: 1aacf409a6a8170bb410da5f2a8084d5484b52df7946c71031b677b4c8ba4489
font_01_sfnt_off0000f84a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84A 10576 bytes
SHA-256: 5e3119f71cd3240b34692d67b7aa58c7ec49977a132eb22ee8eb88303a5ee380

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