Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a21a121423557aa…

MALICIOUS

PDF

75.7 KB Created: 2021-04-29 03:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 126a9383bb434775993b7540ee02852f SHA-1: ae0f7a3c79c7c284f7fa7420bf345104d6fe552e SHA-256: 6a21a121423557aa74f25569939fc3ab321081adfd8998ea954fb3358f27557c
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://xezojetit.ru/strik?utm_term=how+to+annoy+your+best+guy+friend+over+text PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417327/normal_5fc9fbf62e4dc.pdfIn PDF document text
    • https://cdn.sqhk.co/manowipete/uThdjjR/1408776466.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/ieicvcS/77268714127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422637/normal_5fe642d10e236.pdfIn PDF document text
    • http://velavedi.iblogger.org/93414926789.pdfIn PDF document text
    • https://cdn.sqhk.co/pixefavenar/FgcRgcm/fox_sports_2_mexico_en_vivo_online.pdfIn PDF document text
    • https://cdn.sqhk.co/tononapiwaso/cjhjfEc/gebilobusewatigitat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448713/normal_6011e2ee757d3.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/hguKN54/ducks_in_a_row_meme_cop_car.pdfIn PDF document text
    • https://cdn.sqhk.co/rewakevutel/XVBJWpw/dental_hygiene_assistant_program.pdfIn PDF document text
    • https://cdn.sqhk.co/lojadisexudo/gihhhTt/bixesokajoromogofijijag.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/dumupa/62009573245.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/gofarodisunamoxopogebud.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/nutebigoniwafositapojuli.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/router_edge_guide_ryobi.pdfIn PDF document text
    • https://740e8036-3174-4dac-ae20-9eee1cd11a0a.filesusr.com/ugd/0f1c31_5eceed318be94b0cab6277428b10badf.pdf?index=trueIn PDF document text
    • http://nivosifif.rf.gd/38304570656.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/sokijogufusinujejemenibas.pdfIn PDF document text
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_a587dd8a973a4eec9534122776f0ef4a.pdf?index=trueIn PDF document text
    • http://gadivedu.rf.gd/axon_movie_full_hd.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_off0000e8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A6 5464 bytes
SHA-256: f15650ad4af14eca196cf0fd200a13ce6f199ee9274a84fe309cadb7426414e5
font_01_sfnt_off0000fb6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6E 10732 bytes
SHA-256: 94bdccebdd08dee444ab006aaa5b764168887cc3a6aec87150a592afcf311e21

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