Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad7de495f020371…

MALICIOUS

PDF

79.5 KB Created: 2021-03-09 17:36:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 990344add9d4be896641f464949ec336 SHA-1: 903de902b700ecb71eb021f36a37fd797e813539 SHA-256: 2ad7de495f0203719e3783b2c843a2279e41bc6fa2870cfc3bff76077ebbe2e1
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 0.9961

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://pelibifir.ru/wix?keyword=magic+volleyball+club+fees PDF link annotation
    • https://gewolurigidanax.weebly.com/uploads/1/3/1/3/131383018/7421295.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464542/normal_601edab9bbc6e.pdfIn PDF document text
    • http://zotokes.iblogger.org/almighty_infinite_father_song.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418762/normal_5ff8471fe2789.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382773/normal_5ffef191c4556.pdfIn PDF document text
    • https://genovaxoduw.weebly.com/uploads/1/3/4/3/134388418/lolutulevivak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379477/normal_5fde6ffa9100a.pdfIn PDF document text
    • https://cdn.sqhk.co/jidulopavoji/Vhjjfgf/cake_decorating_tools_online_uae.pdfIn PDF document text
    • http://gosologesegob.iblogger.org/how_to_charge_stanley_flashlight.pdfIn PDF document text
    • https://gisixumaxen.weebly.com/uploads/1/3/1/8/131856636/pabapolinazabota.pdfIn PDF document text
    • http://lakurix.22web.org/good_acknowledgement_for_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387428/normal_5fd2a3bd71b27.pdfIn PDF document text
    • https://cdn.sqhk.co/sebuwemid/haWgdJr/30842473938.pdfIn PDF document text
    • https://xikigojajutu.weebly.com/uploads/1/3/4/3/134385057/sopikolular.pdfIn PDF document text
    • http://faxadiweruxu.22web.org/poemas_de_amor_alfonsina_storni_libro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://filulakakinu.epizy.com/17592903757.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/symantec_dlp_sizing_guide.pdfIn PDF document text
    • http://pikegasek.epizy.com/dojoreduxabe.pdfIn PDF document text
    • http://baguzakanaso.epizy.com/fudaj.pdfIn PDF document text
    • http://muparokaxewidad.rf.gd/youku_video_er_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/barawuvaliga.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/school_leaving_certificate_application_template.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/ghostbusters_the_video_game_trophy_guide.pdfIn PDF document text
    • http://zepumibofisi.epizy.com/vutuzep.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/paveturofip.pdfIn PDF document text
    • http://buzuvemujogumob.epizy.com/launchpad_programming_guide.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_off0000f439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF439 5260 bytes
SHA-256: 562c74fdb43ae85bd429ab94fbb3f26a99664cf8870c3512851f3eaf6d1c22ae
font_01_sfnt_off00010658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10658 12980 bytes
SHA-256: c3f9fb0f8fbc41a16dbf1eb7c2acb4d38421dfb6819850b1ab26f5f46597f012

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