Malicious PDF — malware analysis report

Static analysis result for SHA-256 f19da43120f9cf5f…

MALICIOUS

PDF

81.3 KB Created: 2021-03-18 07:54:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 733d309bdcc93b75b72ead1002c30847 SHA-1: da21dc4cd04baf64db27aa2b6c9440f62a4643f5 SHA-256: f19da43120f9cf5f859ee79f70ad8478b3bcbcdeb777373050b133370397ed55
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous embedded URLs suggest it's designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/strik?utm_term=magnum+x7+tips PDF link annotation
    • https://sivesasa.weebly.com/uploads/1/3/4/6/134669324/mejir.pdfIn PDF document text
    • http://moxilekulina.getenjoyment.net/addition_table_1_100.pdfIn PDF document text
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/4130473.pdfIn PDF document text
    • https://vidowenabep.weebly.com/uploads/1/3/5/3/135322196/3575904.pdfIn PDF document text
    • https://wupixizot.weebly.com/uploads/1/3/5/3/135398135/dimilumadajavotivuxi.pdfIn PDF document text
    • https://fojaloda.weebly.com/uploads/1/3/0/7/130776233/5d979c247.pdfIn PDF document text
    • https://medefidonirefej.weebly.com/uploads/1/3/5/3/135324812/5a4323976f.pdfIn PDF document text
    • https://jositaloj.weebly.com/uploads/1/3/4/0/134042718/rupudopo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402519/normal_5fcc0c35d872f.pdfIn PDF document text
    • https://wobipogipexiwom.weebly.com/uploads/1/3/1/0/131070125/a1640146d.pdfIn PDF document text
    • http://faxobasom.22web.org/57647411093.pdfIn PDF document text
    • https://nonafinawajag.weebly.com/uploads/1/3/4/3/134331790/1519621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414502/normal_603c2dfcc148e.pdfIn PDF document text
    • https://rojanudase.weebly.com/uploads/1/3/0/9/130969060/1a7f2afc2c2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jetetekeputesi.epizy.com/the_secret_2006_movie_watch_online_free.pdfIn PDF document text
    • http://sonapap.rf.gd/sedorivukaxabenosijez.pdfIn PDF document text
    • http://bigefen.rf.gd/authorized_recipient_form_956.pdfIn PDF document text
    • http://fabedidatifi.onlinewebshop.net/niwejesolawifalivasawepok.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_off000101de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DE 5164 bytes
SHA-256: a7e8aae4e0ae05dab066d38e8f84e05a52c0ddb5c3ec0ea37f0a3e8c538099d5
font_01_sfnt_off0001137d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137D 10872 bytes
SHA-256: 42302d404364dd5f4def584d05232b054322e6eaf83efa21218adb7ae7025017

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