Malicious PDF — malware analysis report

Static analysis result for SHA-256 5955f252199ffe09…

MALICIOUS

PDF

84.8 KB Created: 2021-03-18 18:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2075831276ffa553cd1cbd4db77204b9 SHA-1: cf99875b33acb61d0b8a73dc6a85f96935250c85 SHA-256: 5955f252199ffe09021d7ebce55d8a13fe66759c1776231ac82282941732664c
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-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://xezojetit.ru/wix?keyword=bottom+up+processing+example+in+everyday+life PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404980/normal_60480762cf205.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/iia0jds/carmel_by_the_sea_restaurants_michelin.pdfIn PDF document text
    • http://qlemelest.online/47443632469yr734.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/wudasaw.pdfIn PDF document text
    • http://zisezamerares.mygamesonline.org/novel_mockingjay_bahasa_indonesia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372399/normal_5fe1978c58ac1.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/opencv_python_tutorial_for_beginners.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481999/normal_602bfa695097b.pdfIn PDF document text
    • https://cdn.sqhk.co/pisimebuziz/OjigfDL/gufetatunofulovado.pdfIn PDF document text
    • http://idealicaitalia-official.site/bumalatak32vb.pdfIn PDF document text
    • http://mybiol.site/29963325422lza2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412159/normal_5fe5b6c9d2c72.pdfIn PDF document text
    • http://zupibupiju.iblogger.org/gisakiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376088/normal_6044747f36ef0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xugidujesu.epizy.com/sitogafuxojuleb.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/sesewenujolipesazogewono.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/armstrong_air_conditioner_serial_number_lookup.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/78265447400.pdfIn PDF document text
    • http://pofiwun.rf.gd/5850017413.pdfIn PDF document text
    • http://feferabi.atwebpages.com/bird_photography_tips_and_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/very_well_king_saha_audio.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B34 5752 bytes
SHA-256: 26fc25a4139d693163f8108de2a743bf4cdfbe8bebed8b7eef637c9684a5473f
font_01_sfnt_off00011ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECC 11584 bytes
SHA-256: 325ab534d7576817571870c061411f653a8ac262a1583dcfaf485cf7f03797f6

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