Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9972c482788fe12…

MALICIOUS

PDF

77.9 KB Created: 2021-03-18 01:16:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 071b8bbfff9eaf80de395a14ad9fe0e8 SHA-1: 10ce3b191e879a5bbf11a629d16b1eda388acfd4 SHA-256: b9972c482788fe122900db374f6a47c70278ae42301756620710aade07e08bf1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://nipisod.ru/award?keyword=abbyy+pdf+transformer+software PDF link annotation
    • http://medolufinumul.sportsontheweb.net/gazenubapopalesu.pdfIn PDF document text
    • http://kagaromorin.medianewsonline.com/6052272171.pdfIn PDF document text
    • http://witikotuxigere.scienceontheweb.net/nadagujedogesakeba.pdfIn PDF document text
    • http://dosubodanes.mypressonline.com/what_is_on_the_one_dollar_menu_at_burger_king.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_e5e7c0f4d9344ee282d15e274852c79a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/mandated_reporter_california_domestic_violence.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/36928339128.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/hoja_de_vida_ejemplos_colombia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4087f2-e42e-4b24-8a7a-ee46233ac828/an_imperial_affliction_amazon.pdfIn PDF document text
    • https://4db61c00-1078-4917-8a1c-a2c1480eb6e0.filesusr.com/ugd/c94206_314df6550aa744ab8e9a9eb6572a8987.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kaxukok/can_i_use_my_linksys_router_as_a_range_extender.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db615d86-f2b9-40cc-85e6-5c09f6e0ad9b/57365700920.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/kovawumemopevad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0938a605-bd8c-482a-8b70-cc13ae3df92a/lg_direct_drive_washer_error_code_ue.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/sukufu.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/outlander_free_will_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/56819272695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2489ceb4-e295-4fed-885f-48cc3361ea1b/heat_exchanger_crack_book.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/vovoserofazorezinud.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

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_off0000f09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09F 5480 bytes
SHA-256: 25fab4a6ff11a6a390c94bdd7070582370c21d67ed33d96fd711630f975d3dc7
font_01_sfnt_off0001033f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033F 11148 bytes
SHA-256: 18dd62b45e0e794b6f5901e72a96c4961d369549963dd352de2e0241029bf6be

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