Malicious PDF — malware analysis report

Static analysis result for SHA-256 53f28df63c8b4647…

MALICIOUS

PDF

80.9 KB Created: 2021-03-17 22:25:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c5c5463b12f347b3ff5752db859240d5 SHA-1: 295008c4812c8c53b80c0c9b5b687624371f9846 SHA-256: 53f28df63c8b46475b82157036ae8ad35cf7e2e202e126784b49c44027f1e313
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=hamilton+beach+70725a+review PDF link annotation
    • http://mikrotikwizard.com/40098220840qt06b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476429/normal_5fd241d9c489a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421365/normal_60435461f2554.pdfIn PDF document text
    • http://jopagozopive.medianewsonline.com/jifewi.pdfIn PDF document text
    • http://rupiwot.getenjoyment.net/pivomibumamewolini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463807/normal_60306f01ad969.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393016/normal_5fd9c4fc47a72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408712/normal_5ffa0d1594663.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383915/normal_6007559303ede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426422/normal_603bf5df3dd1e.pdfIn PDF document text
    • http://zesegalos.scienceontheweb.net/ielts_writing_task_2_samples_band_6.pdfIn PDF document text
    • http://creamwalls.space/tovuxazefalaruxiwodetmnquf.pdfIn PDF document text
    • http://habirovradik.ru/strong_bible_verses_kjvuvzql.pdfIn PDF document text
    • http://jsexj.fun/vekibadisinoralesiao4ba.pdfIn PDF document text
    • http://lighttravel-ng.com/python_learning_path_githubxu8ve.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/tadevewuju/1884334147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d82be83f-fd33-41ed-9c11-1d77078b7a7c/can_my_lease_be_terminated_during_covid_19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bece78d4-f141-4158-a854-db61be08cbe0/72168486668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5ca1bf8-fc6e-4bcf-8956-8ecce7db3e83/82714507193.pdfIn PDF document text
    • http://pawepeg.atwebpages.com/list_of_all_sports_in_the_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0136ac3d-b266-48f2-baeb-14a740939bc7/70243779144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3a9914c-4390-4529-b3db-a3012a381302/what_is_the_purpose_of_literacy_week.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/28803710151.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/27389316423.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_off0000fbff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFF 5592 bytes
SHA-256: 6871f1f69382604b7d8f7a08b58fbce8d9554f1a587b061311d788dc9ed71405
font_01_sfnt_off00010ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF7 11616 bytes
SHA-256: ebb8ec24d6b1de45326a4b6e8467cbba92dad5c156a726a2624d41edc51c1c91

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