Malicious PDF — malware analysis report

Static analysis result for SHA-256 9286ebdcc564c08b…

MALICIOUS

PDF

92.1 KB Created: 2021-06-01 08:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 757cb03384a4ceb91014e820879a9309 SHA-1: 536a602e597addf3661d786fae88268a5c38c7b3 SHA-256: 9286ebdcc564c08b7cb09cba240e090542afb36fa2dffd156c9c7231e444ec56
186 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 0.9997

Heuristics 6

  • 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.
  • 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://queure.ru/pbw?utm_term=volumen+plaquetario+medio+bajo+pdf PDF link annotation
    • https://wixofixun.weebly.com/uploads/1/3/1/3/131379115/pobudapezerabudano.pdfIn PDF document text
    • https://ravijirigiraga.weebly.com/uploads/1/3/4/6/134649302/114594.pdfIn PDF document text
    • https://sulunekuzesafap.weebly.com/uploads/1/3/1/4/131406846/fiziravajov.pdfIn PDF document text
    • https://kuduxuke.weebly.com/uploads/1/3/5/3/135323303/fuwaka.pdfIn PDF document text
    • https://fojevatiseme.weebly.com/uploads/1/3/4/4/134400043/tixijefotoluzok-sifunuv-razikefakepawe-fidodiji.pdfIn PDF document text
    • https://rijivujebevobog.weebly.com/uploads/1/3/4/4/134488471/6cf93f6bcd3.pdfIn PDF document text
    • https://sabewuxibiw.weebly.com/uploads/1/3/4/7/134718514/8b7b3156c4.pdfIn PDF document text
    • https://gafukarufigak.weebly.com/uploads/1/3/5/3/135309608/vizidewijexitaf.pdfIn PDF document text
    • https://rigaxufoze.weebly.com/uploads/1/3/4/3/134386371/9118690.pdfIn PDF document text
    • https://giwulotasika.weebly.com/uploads/1/3/1/4/131411199/gokoma_zenof_sitonowa.pdfIn PDF document text
    • https://zogabugopevaluz.weebly.com/uploads/1/3/0/8/130814784/fajijarupepos.pdfIn PDF document text
    • https://ninujesifig.weebly.com/uploads/1/3/1/4/131453022/4412311.pdfIn PDF document text
    • https://bavexopifepixab.weebly.com/uploads/1/3/4/6/134683122/xevitejapob.pdfIn PDF document text
    • https://jedunifoxawixe.weebly.com/uploads/1/3/4/4/134458330/4934044.pdfIn PDF document text
    • https://senabexe.weebly.com/uploads/1/3/4/2/134265557/7878676.pdfIn PDF document text
    • https://zaxiradijewebox.weebly.com/uploads/1/3/4/8/134889682/7c143aaa9bf0e.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/dd1022aa-b6cd-438e-bac3-9b83a7c34e5d/driver_easy_pro_5.6.15_license_key_free_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae1217a8-02f1-4538-96df-d23ed47ed696/photosynthesis_and_respiration_review_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6219f998-7330-4dec-91b6-97782c1c3dcc/2017_kawasaki_ninja_300_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39ca8bc2-ac52-4e5f-bdec-be3a8c17cb78/h4n_pro_compatible_sd_cards.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_off0001245a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245A 5316 bytes
SHA-256: 9f290d177f0780a396ef24cde44387dc214f5f96ca220dc4112d349793a78794
font_01_sfnt_off00013659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13659 13492 bytes
SHA-256: f66713b3578740fdc64aa1503ea49b532c7a1701d1f032630e1cd4dd8d661b7f

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