Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce04c3888a9eae2…

MALICIOUS

PDF

79.3 KB Created: 2021-03-09 07:07:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 36820302c8a105548a706a6c9fd998ab SHA-1: 10440fd2d8d0a6b71638548b94198f1155922671 SHA-256: 1ce04c3888a9eae221d266ea2ee66e32f157b25be8298fddbb76b28e5b789bc9
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://nipisod.ru/wix?keyword=notre+dame+chemistry+major PDF link annotation
    • http://tafakiduwav.scienceontheweb.net/nesco_american_harvest_food_dehydrator_and_jerky_maker_user_manual.pdfIn PDF document text
    • http://pusewuvi.medianewsonline.com/58145100547.pdfIn PDF document text
    • http://getyourscore.info/62416218890bz80i.pdfIn PDF document text
    • https://sonujeti.weebly.com/uploads/1/3/0/9/130969686/7280179.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/anatomy_for_sculptors.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/public_relations_job_description.pdfIn PDF document text
    • http://boldly-grow.com/14369305606wpm1w.pdfIn PDF document text
    • http://siteznakomstv69.space/limudowubafadipiixn44.pdfIn PDF document text
    • http://nadipewin.mywebcommunity.org/why_is_my_fridge_leaking_water_inside.pdfIn PDF document text
    • https://folimero.weebly.com/uploads/1/3/2/6/132695744/mivusepesanenelu.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/philips_system_one_cpap_manual.pdfIn PDF document text
    • http://bewizasosu.sportsontheweb.net/how_he_loves_me_lyrics_jesus_culture.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/classical_guitar_tabs_free.pdfIn PDF document text
    • http://rat-red.space/28839153064snvhg.pdfIn PDF document text
    • https://zibinileder.weebly.com/uploads/1/3/4/7/134748255/fd1fa.pdfIn PDF document text
    • http://zekojotewakugag.mypressonline.com/lukobanopovi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/94373c9f-68b8-49b2-993d-0a4e2e961de1/76648929571.pdfIn PDF document text
    • http://suxudogakol.myartsonline.com/zamutuwiwaxeditudikes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d02ffaa-63c5-4b97-bf99-2d01a4d5d740/the_kolbrin_bible_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ed511d2-da88-443c-b7b8-2b2d9e0041ce/dazoder.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_off0000fa4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4A 5292 bytes
SHA-256: daf56989342968803d547c0580d6830e3d0f8fc193359f5d8c75bd07d7e59eeb
font_01_sfnt_off00010c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C33 10476 bytes
SHA-256: 9939be4ac6287c957b5a5ce006b76701b0be5ac7053564e4a4e07adb69f2c594

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