Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d894285453e4b4b…

MALICIOUS

PDF

67.9 KB Created: 2021-03-25 10:07:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c74db89f3497d8249ea263265edf8e0a SHA-1: 52ea1a9c76dbd6a4265a44093ba457f5f70164c7 SHA-256: 0d894285453e4b4b7b49a2b9b4c25fe58d3b797b2a6348e583047c305e27e4e2
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://lozipotod.ru/award?keyword=social+media+and+academic+performance+questionnaire+pdf PDF link annotation
    • http://kugufenabigidef.iblogger.org/beroxawodowivunonumumu.pdfIn PDF document text
    • http://xaredazisom.mywebcommunity.org/42785110541.pdfIn PDF document text
    • http://daxosivonoz.iblogger.org/stages_of_language_acquisition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403541/normal_5fe8b54b7efdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476952/normal_5ffb5d12f3c27.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391008/normal_5fec921cb7c86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501383/normal_603eade29f222.pdfIn PDF document text
    • http://wojazilasifef.iblogger.org/7401311341.pdfIn PDF document text
    • http://fuxisileza.mywebcommunity.org/72009679304.pdfIn PDF document text
    • http://legejuwarowu.22web.org/sebugewekovijuwureliwag.pdfIn PDF document text
    • http://najisemure.medianewsonline.com/areas_sensoriales_del_cerebro.pdfIn PDF document text
    • http://rolazipomi.22web.org/66154539601.pdfIn PDF document text
    • http://nusixogej.iblogger.org/c5_corvette_how_to_clear_dtc_codes.pdfIn PDF document text
    • http://tederurokeroga.iblogger.org/bruker_d8_advance_user_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428039/normal_6051a33fea4b4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zumaborelap.rf.gd/wikobupoxipuxusefawewag.pdfIn PDF document text
    • http://zaxukesaludu.epizy.com/08_avenger_battery_location.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/what_are_cultural_values.pdfIn PDF document text
    • http://naxamuj.epizy.com/news_broadcasting_script_english.pdfIn PDF document text
    • http://tikomiwewo.atwebpages.com/1590959474.pdfIn PDF document text
    • http://begupegag.epizy.com/la_campanella_violin.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_off0000ccd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD0 5532 bytes
SHA-256: cc72853af2c9e043ad57cb67d3fdfa2a6d85b8220aff5e875a8abb0df1290381
font_01_sfnt_off0000df82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF82 10148 bytes
SHA-256: ac364714522ab98948fd502fc3687bd12e845187f5f1aaf74e792d18ea18a0d9

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