Malicious PDF — malware analysis report

Static analysis result for SHA-256 43f5d46dc40147fb…

MALICIOUS

PDF

76.6 KB Created: 2021-04-04 12:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6f312706fda83f8adc3e322f0a9bd9fb SHA-1: b85e5017eca30e8193c965f6ee2453e162640610 SHA-256: 43f5d46dc40147fb1f4c2cc59110207d573ed3edb120cf43358637bc27a9777c
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/wix?keyword=leggings+transparent+background PDF link annotation
    • https://rifidikebipe.weebly.com/uploads/1/3/0/9/130969129/doxirivivab_poxizudawiruziw.pdfIn PDF document text
    • http://axecheat9.xyz/dekelanupowedoluuk8n0.pdfIn PDF document text
    • http://reduslim-buy.site/rival_electric_ice_cream_maker_instructionslg2xe.pdfIn PDF document text
    • https://bufopavebusi.weebly.com/uploads/1/3/4/8/134853568/volewibub.pdfIn PDF document text
    • https://rogubofiduga.weebly.com/uploads/1/3/1/0/131069879/tisivavejeg_dozover_vaxulazurixeke.pdfIn PDF document text
    • https://zusaneji.weebly.com/uploads/1/3/0/8/130813769/c0fe9f6.pdfIn PDF document text
    • http://mantenancie.com/casadio_undici_a2hnmdz.pdfIn PDF document text
    • http://nijepatexosanus.medianewsonline.com/secure_payment_gateway.pdfIn PDF document text
    • https://fosevagepuvuro.weebly.com/uploads/1/3/1/8/131858592/33f75a77596fe0.pdfIn PDF document text
    • http://bidimiw.sportsontheweb.net/nemuzananoxafem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wokarodefi.onlinewebshop.net/product_recall_procedure_format.pdfIn PDF document text
    • http://beliraguw.onlinewebshop.net/segapusobezof.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/silixuxomoti.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/1607777814.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/chennai_weatherman_report_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/ririrawowugurasilinanika.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/vaziwobix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6f8c80c-3e0e-4ba3-8f79-41d5e3c8d773/maytag_neptune_gas_dryer_wont_start.pdfIn PDF document text
    • http://gemovimuwopete.atwebpages.com/25550237497.pdfIn PDF document text
    • http://davofunup.onlinewebshop.net/how_to_clean_dyson_animal_vacuum_hose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d7bc356-6b40-4ab9-8e07-5f29194fc53d/3839286706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb4d29db-4326-4ca5-b3d5-d941d0878a0d/keto_recipes_you_can_freeze.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_off0000ee14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE14 5352 bytes
SHA-256: b360c2a1459d27d9b4504255552001e146992926c1c966ba250fa282c3644d56
font_01_sfnt_off00010059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10059 10708 bytes
SHA-256: 7962db398a634a9aa6eaa767f1fb417804578ba6f875380cfaf7c76b7c0e4192

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