Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f894def55f0bce9…

MALICIOUS

PDF

77.5 KB Created: 2021-02-15 17:22:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3f847e377cafa453a948a48355855eeb SHA-1: 698854a34756d7a9738fe3c7f4120529614e8ec4 SHA-256: 7f894def55f0bce98501011194945e119e035ab48266793f1e42fb06890fdb3e
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://bologen.ru/strik?utm_term=air+force+portal+login+mac PDF link annotation
    • https://bejeselujolir.weebly.com/uploads/1/3/1/3/131379719/9f0fd.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/fajejh3/pawudovanaxelofepe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449630/normal_60260e1a8c014.pdfIn PDF document text
    • http://missunik.space/zodoxoxesapusosumapugo6o5rn.pdfIn PDF document text
    • https://molobaguzali.weebly.com/uploads/1/3/0/7/130739923/6046690.pdfIn PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/078fbf85c21482b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371809/normal_600379a9d1628.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452398/normal_5feb8a6ff2003.pdfIn PDF document text
    • http://razvivatel.blog/8622662560694s0n.pdfIn PDF document text
    • https://cdn.sqhk.co/rapurakoke/chaCaiA/waposejenunira.pdfIn PDF document text
    • https://cdn.sqhk.co/naliwanik/agc8ihv/42118798053.pdfIn PDF document text
    • https://bapamebitisetup.weebly.com/uploads/1/3/4/3/134325238/f9465.pdfIn PDF document text
    • http://shop50off.info/23345656182pkf73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456114/normal_5fe150ecd3f11.pdfIn PDF document text
    • https://cdn.sqhk.co/bowazeduz/cijVoja/monster_chef_stewed_pork_rice.pdfIn PDF document text
    • http://myluckybet.xyz/australia_student_visa_checklistql8du.pdfIn PDF document text
    • https://fekodajitor.weebly.com/uploads/1/3/0/8/130874258/guganonosaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414677/normal_5fda7c548a32b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tugumeb/banstead_infant_school_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/83673753358.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/womufek.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/58668504806.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_off0000f2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A0 5148 bytes
SHA-256: 3a1c4902b559b5ca70129c34ad4ff8bc2ecb3a31f9e5f49e021c566277476bff
font_01_sfnt_off00010414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10414 10644 bytes
SHA-256: b05655eaca2190e58d40e529e12af6d2988c67bc1423919f3fe61f4df2310fb7

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