Malicious PDF — malware analysis report

Static analysis result for SHA-256 295f9e61e0315aa3…

MALICIOUS

PDF

78.0 KB Created: 2021-04-03 06:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 298ef2a86a081441183631b3344229ce SHA-1: 750a0ee4d1997acbb9d234097bd7fa7f0fadf124 SHA-256: 295f9e61e0315aa3cd132a292a4c9c29a5bf0ca076484313ee4fe21c8a256f42
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9993

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 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://bologen.ru/strik?utm_term=brother+cs5055prw+how+to+thread+bobbin PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407733/normal_60384026b89b4.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/what_is_the_best_self_propelled_lawn_mower_for_the_money.pdfIn PDF document text
    • http://zesenadozefut.sportsontheweb.net/45630349562.pdfIn PDF document text
    • http://werojati.getenjoyment.net/mugidoketujud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489244/normal_605fd0af8efb5.pdfIn PDF document text
    • https://bijejumutitin.weebly.com/uploads/1/3/1/4/131454352/lisutekuguxif_leximusinit.pdfIn PDF document text
    • https://pedulexonevexo.weebly.com/uploads/1/3/0/7/130740508/bevosut.pdfIn PDF document text
    • http://zogometemo.sportsontheweb.net/74053262004.pdfIn PDF document text
    • https://kukonugaxa.weebly.com/uploads/1/3/5/3/135327287/8524200.pdfIn PDF document text
    • http://befujukipepejem.mygamesonline.org/4784119096.pdfIn PDF document text
    • https://vefamomapebimid.weebly.com/uploads/1/3/1/4/131406391/9015931.pdfIn PDF document text
    • https://fefufivakelazi.weebly.com/uploads/1/3/0/7/130739222/8705890.pdfIn PDF document text
    • https://kidubaviputotej.weebly.com/uploads/1/3/4/5/134520398/6375429.pdfIn PDF document text
    • http://tututot.mygamesonline.org/convert_to_autocad_dwg_online_free.pdfIn PDF document text
    • https://tamilazubi.weebly.com/uploads/1/3/4/6/134604156/e9f58f3c21b771.pdfIn PDF document text
    • http://rezubodojel.medianewsonline.com/sentences_in_past_simple_affirmative_negative_and_interrogative.pdfIn PDF document text
    • http://futigovu.scienceontheweb.net/anemia_in_pregnancy_thesis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogurorirerew.onlinewebshop.net/branches_of_metaphysics_in_philosophy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/184f0c49-e313-456f-bba2-37a7bf782c06/xewafufudededejivik.pdfIn PDF document text
    • http://biwosagamivi.myartsonline.com/18176284228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/761f082f-aaf1-43f4-9fa3-086c8a8e732c/vejatonofirubemudemixex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5d38c36-bc2c-4bf8-b4ba-c3e8178d8fe1/nuregijelabujereses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2043874a-2d0a-4f10-8df8-d219b8876269/hamilton_beach_roaster_oven_turkey_temp.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_off0000f112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF112 5676 bytes
SHA-256: 8f5c19f4a57b6b0d26cd9a3e8c5c8c112dceb5f707d1ef6e764a8d4f3effabf6
font_01_sfnt_off0001046c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046C 10716 bytes
SHA-256: 47cc388565cc2c9d6a29b0516fb217da2cf01360b1e78b8d79df8201c4f9c83b

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