Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2a5d3ffd2d8d5f…

MALICIOUS

PDF

80.3 KB Created: 2021-02-18 03:56:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 68af3508995b252be7cf3c02246fe467 SHA-1: 773365537cc8d95560ec089f97eba299d67a7dae SHA-256: 0a2a5d3ffd2d8d5f952542b97e18c88b89ba4ab09743eb2bd006bef90ece447f
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 0.9998

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=emma+zunz+cuento+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454809/normal_5fca5a6cd55e4.pdfIn PDF document text
    • https://cdn.sqhk.co/fanabezom/30ABJn9/worakojinukuligawibofu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427085/normal_600b8e387458a.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/ihg8mjj/77291827125.pdfIn PDF document text
    • http://0fruits.space/70164313865dlyxo.pdfIn PDF document text
    • http://iranianvc.com/60931374252nh31e.pdfIn PDF document text
    • http://sixawuragime.iblogger.org/35529506739.pdfIn PDF document text
    • https://cdn.sqhk.co/gepaxulunan/jfyhjjg/earthquake_los_angeles_today_just_now.pdfIn PDF document text
    • https://cdn.sqhk.co/jedugifaxido/dX1Dgfe/solano_supersolano_3500_lite_hair_dryer.pdfIn PDF document text
    • http://ledy66.net/loviwegikikuzaruf8fxk.pdfIn PDF document text
    • http://hs-life.ru/digitech_rp155_pricefgjbg.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/jtpggjj/79637194810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448744/normal_5fe80c69315ca.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/vonusirukete/twinkle_twinkle_little_star_sheet_music_flute.pdfIn PDF document text
    • http://jofawapedoguw.rf.gd/drylin_linear_guide_system.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/razewaxakirir.pdfIn PDF document text
    • http://nowaginog.epizy.com/basic_english_grammar_workbook.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_off0000fed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED2 5000 bytes
SHA-256: 9a0db4ef8516b81a72a6e2fbfc73b8cc8c4990b9daaf56031187587197482761
font_01_sfnt_off00010fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD6 10964 bytes
SHA-256: f0c798777a8ac831437990e302fc41793da61bf4a37ecacff78dc78e0798d2e6

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