Malicious PDF — malware analysis report

Static analysis result for SHA-256 c551c1b792902784…

MALICIOUS

PDF

78.4 KB Created: 2021-03-25 17:07:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 006314e2edb604883da3d323661f2864 SHA-1: e98e41de22796c88686ddb852c4224bc42341144 SHA-256: c551c1b792902784c29f8a594149bb834edb92221b6c7f39316b9a7827e395e6
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File Execution: User Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a ClickFix paste-and-run lure. 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 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/strik?utm_term=why+has+my+bookmarks+toolbar+disappeared PDF link annotation
    • http://helpcopyright-service.com/panasonic_bq-cc17_battery_charger5rt2y.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/xamozufipofe.pdfIn PDF document text
    • http://podeves.xyz/bob_revolution_flex_2.0_lunarv4o83.pdfIn PDF document text
    • http://wutanumijejol.sportsontheweb.net/pekifizozawilenevuso.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/jimini.pdfIn PDF document text
    • http://xamoxipuwizutux.scienceontheweb.net/patofisiologi_cacar_air.pdfIn PDF document text
    • http://twobigs.space/must_call_a_designated_initializer_of_the_superclassa6rog.pdfIn PDF document text
    • http://rodina38.ru/687450087247hml.pdfIn PDF document text
    • http://popisazono.getenjoyment.net/can_you_keep_netherland_dwarf_rabbits_inside.pdfIn PDF document text
    • http://fbcopyright-center.com/2380641960v0jm2.pdfIn PDF document text
    • http://dofujifeluradep.medianewsonline.com/dictionary_oxford_download.pdfIn PDF document text
    • http://reliables.ru/sefizoradiwabu1xl7.pdfIn PDF document text
    • http://top-shop-store.website/gukotemox5nekn.pdfIn PDF document text
    • http://kurametugugu.mygamesonline.org/73041952.pdfIn PDF document text
    • http://dronextactical.xyz/98543157527inwt4.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/b8bec98b-9d3d-471f-be49-c57702d55160/best_time_for_squidding.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a01062-3bdf-484d-bb18-b31f4b5b6a5b/78881799432.pdfIn PDF document text
    • http://xakazasaravi.onlinewebshop.net/65122706989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53535354-d4ad-48d3-b07b-49006a361983/the_yearling_chapter_25_summary.pdfIn PDF document text
    • http://pedirite.onlinewebshop.net/bedebaradukobamakitela.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ead2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD2 5516 bytes
SHA-256: a264e087666df4c14511f222eaddfca4f8307a2d8253af8c7309b05b7b374fb2
font_01_sfnt_off0000fd6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6B 1936 bytes
SHA-256: cf50d13c5c21d2e34fba0d9dd21119d4839fc35fdaebfe62cbacf51850cc328d
font_02_sfnt_off000106aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AA 10816 bytes
SHA-256: 6271596305e8f085a4ab1a4694f1af643dc932d54ae3ddadc16b715db6bbe4bc

Open this report in the interactive analyzer, or submit your own file for analysis.