Malicious PDF — malware analysis report

Static analysis result for SHA-256 20549df58d3fada8…

MALICIOUS

PDF

77.9 KB Created: 2021-04-19 19:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 78385b7d3abfb99abb4807586ceb9a83 SHA-1: c55f737ab52a24a15ec6f15c4a21c9b14004cf00 SHA-256: 20549df58d3fada8fb510f62245af690e2042fc852645e01411f1767a35154b4
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, appears to contain metadata related to 'Abaqus 6.14 documentation', likely a lure to attract users seeking technical information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://jottigo.ru/strik?utm_term=abaqus+6.14+documentation PDF link annotation
    • https://dawejufajipamoz.weebly.com/uploads/1/3/5/3/135350304/savopowixaked_sejorowi_sitetafameje_juvomedugode.pdfIn PDF document text
    • http://1freedom.space/use_the_index_luke7k9k9.pdfIn PDF document text
    • https://muverope.weebly.com/uploads/1/3/0/7/130776407/niner_zaduniwipifu.pdfIn PDF document text
    • https://sivoroxusakigob.weebly.com/uploads/1/3/1/4/131453081/7449715.pdfIn PDF document text
    • https://lemapemoj.weebly.com/uploads/1/3/4/0/134040436/xatiwolapogi_rewabegazitonot_jizobusa.pdfIn PDF document text
    • https://novifutifodex.weebly.com/uploads/1/3/1/6/131606636/vivugo_nogulizabexewur_dagijiperajof_fasazagazejar.pdfIn PDF document text
    • http://natorg.fun/lego_challenge_task_cardsm9k41.pdfIn PDF document text
    • http://bitcoinchat.fun/80947779601te537.pdfIn PDF document text
    • http://buytoday.cc/lefuku981t5.pdfIn PDF document text
    • http://3203epworthcres.com/zasirzkdkd.pdfIn PDF document text
    • http://jopulemasawo.22web.org/adobe_viewer_for_chrome.pdfIn PDF document text
    • http://pro-gram.pro/72478787683ycntu.pdfIn PDF document text
    • https://jipepusubame.weebly.com/uploads/1/3/4/0/134040653/deea359d6.pdfIn PDF document text
    • http://seguwob.22web.org/matthews_plant_virology_fourth_edition.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/kedabufomorabergb806.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://salivokeru.epizy.com/latex_bibliography_title_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a0a329f-fc97-49ed-9a5f-7cdf8cd150a2/eclipse_bookstore_bellingham.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d55c27e5-cabe-4350-a894-059e71bf3484/jopajog.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_off0000f294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF294 5536 bytes
SHA-256: 6f567bc533e681f0165a59dcce2c95be42a4c61ab6537990ae22c1ea50cac6fe
font_01_sfnt_off0001056c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056C 10900 bytes
SHA-256: 50cc9dbbcded8e521d4459cbeb50bc109bc0f5bbe7074222fef86397312efe3a

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