Malicious PDF — malware analysis report

Static analysis result for SHA-256 c947be0f36813a1c…

MALICIOUS

PDF

82.9 KB Created: 2021-03-04 10:53:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: eb24920a8d7cc376a1cc810d5b0f85f3 SHA-1: 27af89399a875903ce9a1a433fae0bf1920ee156 SHA-256: c947be0f36813a1c3321585202a4a730638141f55800f397f2da11d80407f67f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, contains text related to a nursing drug handbook, suggesting a lure to trick users into visiting the malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/wix?keyword=saunders+nursing+drug+handbook+2020+apa+citation PDF link annotation
    • http://lnstagram-help-businesss.com/how_do_you_know_how_many_atoms_an_element_hastvk48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478687/normal_603cb11a94c50.pdfIn PDF document text
    • http://health-top.ru/670428728205mnzi.pdfIn PDF document text
    • http://livecopyrightverification.com/understanding_electronics_components_free_download95xth.pdfIn PDF document text
    • http://azorocheat5.xyz/pokopavolurivenikazi32x1.pdfIn PDF document text
    • http://menetufebev.22web.org/38071648416.pdfIn PDF document text
    • http://psychologyrelax.xyz/egg_wars_minecraft_server40lo1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460251/normal_6036dbf78ddf3.pdfIn PDF document text
    • http:///purl.oclc.org/dataset/WorldCat&gtIn PDF document text
    • http:///www.worldcat.org/title//-/oclc/38215114-PublicationEvent/2009_st_louis_saunders_elsevier&gtIn PDF document text
    • http:///experiment.worldcat.org/entity/work/data/501544762/Place/st_louis&gtIn PDF document text
    • http:///id.loc.gov/vocabulary/countries/mou&gtIn PDF document text
    • http:///experiment.worldcat.org/entity/work/data/501544762/Place/philadelphia&gtIn PDF document text
    • http:///experiment.worldcat.org/entity/work/data/501544762/Topic/drugs&gtIn PDF document text
    • http:///dewey.info/class/615/a12/&gtIn PDF document text
    • http:///id.loc.gov/authorities/subjects/sh90000174&gtIn PDF document text
    • http:///experiment.worldcat.org/entity/work/data/501544762/Topic/clinical_pharmacology&gtIn PDF document text
    • http:///experiment.worldcat.org/entity/work/data/501544762/Topic/pharmaceutical_preparations&gtIn PDF document text
    • http:///experiment.worldcat.org/entity/work/data/501544762-Topic/nursing&gtIn PDF document text
    • http:///worldcat.org/entity/work/id/501544762&gtIn PDF document text
    • http:///www.worldcat.org/oclc/606347508&gtIn PDF document text
    • http:///www.worldcat.org/title//-/oclc/38215114-PublicationEvent/1998_philadelphia_saunders_1998&gtIn PDF document text
    • http:///experiment.worldcat.org/entity/work/data/501544762/Agent/saunders&gtIn PDF document text
    • http:///experiment.worldcat.org/entity/work/data/501544762/Agent/saunders_elsevier&gtIn PDF document text
    • http:///worldcat.org/issn/1098-8661&gtIn PDF document text
    • http:///bnb.data.bl.uk/idIn PDF document text
    • http:///www.worldcat.org/title//oclc/38215114&gtIn PDF document text
    • http:///experiment.worldcat.org/entity/work/data/501544762-Agent/saunders_elsevier&gtIn PDF document text
    • http:///experiment.worldcat.org/entity/work/data/501544762-Topic/clinical_pharmacology&gtIn PDF document text
    • http:///experiment.worldcat.org/entity/work/data/501544762-Topic/drugs&gtIn PDF document text
    • http:///id.loc.gov/authorities/subjects/sh2008102454&gtIn PDF document text
    • http:///id.loc.gov/authorities/subjects/sh2008108525&gtIn PDF document text
    • http:///experiment.worldcat.org/entity/work/data/501544762-Topic/pharmaceutical_preparations&gtIn PDF document text
    • http:///www.worldcat.org/title/oclc/38215114,1998_philadelphia_saunders_1998-of-the-year-visit-//experiment.worldcat.org/entity/work/data/501544762-topic/care-gtIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bogeguva/lifetuvelezakawolujolo.pdfIn PDF document text
    • http://zunedolu.rf.gd/kapadivojiwujetegivabol.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/45462460812.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/microsoft_word_resume_templates_2019.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_off000105ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AC 5884 bytes
SHA-256: 5f8f3ba735db203d8c5848faea596a4cee49c64fb658e9ea8a27a79fcfe4ab74
font_01_sfnt_off000119a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A6 10748 bytes
SHA-256: 3c84b1b55aeb9175fb8ef82b3c7a3308137e0dfe02e64ec0376c1776a3af8967

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