Malicious PDF — malware analysis report

Static analysis result for SHA-256 c776efbc5b8e6100…

MALICIOUS

PDF

83.0 KB Created: 2021-04-08 05:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0a85defacafee308f8c79982fbae8bad SHA-1: 59637e986c5822b7bd9218e91de88e185dbcd571 SHA-256: c776efbc5b8e610024324810144abefcd49c2a8f4da8ccd902bc1e99b6bc1db7
134 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 and presents a deceptive download button. 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gimoguvi.ru/123?utm_term=vsco+full+pack+android+terbaru PDF link annotation
    • https://wotowabe.weebly.com/uploads/1/3/4/6/134688823/228ceac11.pdfIn PDF document text
    • http://jovepodixowofow.mygamesonline.org/53447139553.pdfIn PDF document text
    • https://sodefabufu.weebly.com/uploads/1/3/4/4/134473286/108267ff0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369919/normal_603a60dbc35dd.pdfIn PDF document text
    • http://pisufixefonof.scienceontheweb.net/breast_cancer_project.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503050/normal_5ff20f5f07b6c.pdfIn PDF document text
    • https://sibemawiwojaro.weebly.com/uploads/1/3/4/8/134887292/xajazujawun_gitarozelovave_mupawinawalar.pdfIn PDF document text
    • http://arevakar-travel.com/443633606395wyk7.pdfIn PDF document text
    • http://sizerasadaxer.mywebcommunity.org/gebifuje.pdfIn PDF document text
    • http://siankaanmexico.com/android_studio_gradle_wrapper_pathg2uki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476011/normal_600b5053109c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381962/normal_6027feb1bbfc2.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/acura_maintenance_code_a13.pdfIn PDF document text
    • https://vebazefi.weebly.com/uploads/1/3/4/0/134040586/6181485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497372/normal_603b03d4dd8d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://seroroxunabolu.onlinewebshop.net/romantic_questions_to_ask_girlfriend.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/pavawidokafavekimuzikodew.pdfIn PDF document text
    • http://tugosamerela.rf.gd/air_entraining_agents.pdfIn PDF document text
    • http://fubuwutunofo.rf.gd/revenue_generation_model.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/fusionner_plusieurs_fichiers_avec_foxit_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/boston_market_brownie_nutrition_facts.pdfIn PDF document text
    • http://pikididubemet.epizy.com/37073399047.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_off00010582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10582 5320 bytes
SHA-256: de753da501a2363ff94207273cfe13b853779e8fb1c6d3aa97791772f44bce43
font_01_sfnt_off000117aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AA 11524 bytes
SHA-256: ad1836164a17aa98492aa3f23ee23f8dc53ac6b469a5c8b087c5a95293cb1e64

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