Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8930e2e678dd7b7…

MALICIOUS

PDF

97.8 KB Created: 2021-04-13 16:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d81a3876461357f8b79b6fa65ea3e3b5 SHA-1: 2992fbf24890d7b27f970b2f5507e83d27b8137c SHA-256: f8930e2e678dd7b7e107cd30dfd9f4bdd9c28a4c3f9abe798edf734919f6e3eb
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links pointing to external PDF documents hosted on various domains, many of which appear to be disposable. The primary URL, 'https://crophysi.ru/strik?utm_term=singular+and+plural+nouns+powerpoint+1st+grade', suggests a potential SEO manipulation or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=singular+and+plural+nouns+powerpoint+1st+grade In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_60571ddd94e66.pdfIn PDF document text
    • https://wadasazaba.weebly.com/uploads/1/3/3/9/133999184/572e0ee04.pdfIn PDF document text
    • https://kakadaten.weebly.com/uploads/1/3/0/9/130969907/99c5323094687.pdfIn PDF document text
    • https://bufuxilanu.weebly.com/uploads/1/3/4/4/134402831/mopuma_geraniv_zarumomiwidunut_godupak.pdfIn PDF document text
    • https://numilobes.weebly.com/uploads/1/3/4/2/134235742/4308220.pdfIn PDF document text
    • https://xuvevajepew.weebly.com/uploads/1/3/0/7/130739459/giwav.pdfIn PDF document text
    • https://wiwujakibites.weebly.com/uploads/1/3/0/7/130740442/53a6c893.pdfIn PDF document text
    • https://tepukijamuboze.weebly.com/uploads/1/3/5/3/135301813/mugolezaloni.pdfIn PDF document text
    • https://vipozuguru.weebly.com/uploads/1/3/1/4/131483083/d8f3a02d78.pdfIn PDF document text
    • https://wabexerimib.weebly.com/uploads/1/3/0/7/130739061/373f7ce4d09937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377401/normal_606201cbd5bba.pdfIn PDF document text
    • https://zakutawevuvukug.weebly.com/uploads/1/3/5/9/135970657/3796473.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://petojijoxura.onlinewebshop.net/what_is_the_meaning_of_the_little_prince_story.pdfIn PDF document text
    • https://75e6061f-eb7a-4ce8-b546-077bf96366c3.filesusr.com/ugd/2dfd19_11d064e93e0a4b7a94d1c081affaaffe.pdf?index=trueIn PDF document text
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_ab48a2d79fb342a0ac71d39d6c274443.pdf?index=trueIn PDF document text
    • https://09d7e2b9-79a3-4876-9e00-73a1ba4263a4.filesusr.com/ugd/92fcd7_acd24dab0bfc4ae28aa7da1ac86276c7.pdf?index=trueIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_158a86890d9d419d8f730b333ead12b8.pdf?index=trueIn PDF document text
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_f694041c7e8347d6a08bb625dc18d143.pdf?index=trueIn PDF document text
    • http://vidugozu.atwebpages.com/razowoxolufurenavezipolo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3B 5256 bytes
SHA-256: 559d089a414a4bbe28bf5a5a35b454d25c64c5e3396c44c541d75bb43949372e
font_01_sfnt_off0001202d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202D 3028 bytes
SHA-256: 3c44dea239f3602749291176b9bc17e4586dd1cf38ece968039203f08a013529
font_02_sfnt_off00012c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C74 11244 bytes
SHA-256: 27864ad96c083808fa832bab5dc401e34f4554e11ea786a17aa721a08bfef0a0
font_03_sfnt_off00015320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15320 16784 bytes
SHA-256: 701a28b73fa92238e51078529324e21776d573eb0fd7bdcedca807fbf036099d
font_04_sfnt_off00016a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A67 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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