Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d5f0a4376e0b1f…

MALICIOUS

PDF

103.8 KB Created: 2021-03-18 21:29:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9bf1f0dde05976d1a1ad51eb7419eb18 SHA-1: 597a2b21c62b195f657f4a104cc5876c0f02b800 SHA-256: d2d5f0a4376e0b1fe2c83a9bf9a52ff9da3f80f725f941466614ac20b59c1805
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 0.9997

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/award?keyword=christmas+carols+songs+pdf PDF link annotation
    • http://pek-24.cc/wugowabomedifozamuduuewqo.pdfIn PDF document text
    • http://pedron.fun/present_progressive_spanish_worksheet_doclcskz.pdfIn PDF document text
    • http://kmplitka.shop/1037302737s6qp1.pdfIn PDF document text
    • http://nepoxiduvilej.scienceontheweb.net/44975659509.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/jakidabunigabilerud.pdfIn PDF document text
    • http://wunadimizurened.medianewsonline.com/mufap.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/85571404616.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/loneminovu/28148276623.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/99928486039.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/nuxezegukopukimotof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e712650d-ceab-4237-b62f-d2f95a0bd6ca/cuisinart_extreme_brew_12-cup_coffee_maker_-_dcc-3650c.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/vafemesikivagenos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e05d2ac-844e-415e-8123-cd765c61c2d4/fajofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98e9a9df-9fbc-411f-a1d2-5c565eb70b74/briggs_and_stratton_725_series_ex_190cc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d26277c3-d433-4141-8db0-0250e7be2078/john_deere_walk_behind_mower_wheels.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/contract_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/chris_brown_indigoat_tour_performers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5562865-f46e-41bb-9824-59221ff5b886/zalumufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/370b065c-c9bd-4772-ae70-31a6e1877b9c/el_libro_de_los_secretos_resumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e94070-78d6-4c79-92c8-1f69dc8795e8/jebuzilutakuzegewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f5a2530-0330-42c0-8b53-8ff74a593271/shadowrun_6th_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4274a80-2cc7-405a-a4c4-f82e8b3c3a53/three_6_mafia_most_known_unknown_download_zip.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_off00014b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B7B 5476 bytes
SHA-256: 34a5922a12456d8e96cc8df254e7ec1828474216df43810f713cdec719d82d8e
font_01_sfnt_off00015de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DE6 17836 bytes
SHA-256: 18e525dc28d69776faf59051b1c03905f93d6fe123ca28ae95efd7b20ef33a64

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