Malicious PDF — malware analysis report

Static analysis result for SHA-256 50bfaeba729d38f3…

MALICIOUS

PDF

90.6 KB Created: 2021-05-30 22:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3eb2dd50e57cfcfd27caf2df78248010 SHA-1: c52ef396f10af1992e172b2ed7d3ab793aac6bba SHA-256: 50bfaeba729d38f37652984f28defaa9e4527e2e4cc9e20afba831424fec768d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://botokaw.ru/123?utm_term=agar.+io+mod+coins+apk PDF link annotation
    • https://konevolog.weebly.com/uploads/1/3/1/6/131606720/mowezosepuz.pdfIn PDF document text
    • https://zimatesuti.weebly.com/uploads/1/3/0/8/130873828/bomiwu_nozov.pdfIn PDF document text
    • https://rukururage.weebly.com/uploads/1/3/0/9/130968917/1360149.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421460/normal_6000abd2768de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421960/normal_60590a87788d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491151/normal_602a50e8c327d.pdfIn PDF document text
    • https://gopikuximodel.weebly.com/uploads/1/3/1/3/131384340/rapiri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482424/normal_6058baa098dfb.pdfIn PDF document text
    • https://kuratiwupojaxu.weebly.com/uploads/1/3/4/0/134017491/lurilaputonekanowige.pdfIn PDF document text
    • https://ludexibof.weebly.com/uploads/1/3/4/6/134638297/8374864.pdfIn PDF document text
    • https://puvugemamoj.weebly.com/uploads/1/3/0/9/130969199/9941807.pdfIn PDF document text
    • https://koborabi.weebly.com/uploads/1/3/0/7/130775888/027055185f76b5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474997/normal_5febd4dbbc818.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387566/normal_5fe276a61e653.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421039/normal_60118dd7ac0b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403680/normal_6064bc3728779.pdfIn PDF document text
    • https://tetatotumesa.weebly.com/uploads/1/3/1/6/131637248/642f3adae6d4e.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
    • https://uploads.strikinglycdn.com/files/5143e8b3-8a4f-4a66-baa0-7d15fafbd3eb/hand_lettering_for_beginners_sarah_ensign.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e7991b3-e6a4-490a-bb0a-f3fec4b78943/48739201847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12ed8a90-0b2f-450e-bba7-4b7f7686fa16/13479969338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a845a9e-eb62-483d-80f2-6ab6c8dbd417/makovuvubulato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5a99816-0e45-4d08-9e48-12a86ddcc70e/thule_bike_rack_hitch_extender.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11041 5036 bytes
SHA-256: 5ff5e376feead12120c39b93eaa7e0ca3818d5545cf1cd7b0ffac588ce78313f
font_01_sfnt_off0001213a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1213A 13492 bytes
SHA-256: 930f372fa2bdc239b11a4879107b77bd0aae3b8f90499b296b1bbbd4b5f1196a
font_02_sfnt_off00014cfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CFA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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