Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce087c62cacb1fb…

MALICIOUS

PDF

79.3 KB Created: 2021-03-07 23:43:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d638d4c8b53538a28c771fc1f7629f55 SHA-1: 2ede067cbc994d3a8830f260af7630011ce3e629 SHA-256: 2ce087c62cacb1fb7636003b70a311b390f3add89cc7b658c89c932eec1385b0
126 Risk Score

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 0.9990

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://jumiwimov.ru/wix?keyword=periodic+table+basics+worksheet+answer+key PDF link annotation
    • http://mawuforoximite.22web.org/sahih_bukhari_book_80_hadith_100.pdfIn PDF document text
    • http://newapegujopabi.22web.org/47964200729.pdfIn PDF document text
    • https://paratokoke.weebly.com/uploads/1/3/0/7/130739311/rotovoziwi-jofaz-vemonorozaba-rofamo.pdfIn PDF document text
    • http://suraneb.scienceontheweb.net/everyones_an_author_2nd_edition_ebook.pdfIn PDF document text
    • http://wiwuwanulujero.iblogger.org/tp-link_tl-wpa4220_manual_espaol.pdfIn PDF document text
    • https://ruvawigalovenu.weebly.com/uploads/1/3/4/3/134318686/7250267.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d8968cac-eaa7-4a17-9c9e-9cb90a3f96d9/82549926035.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/oracle_encumbrance_detail_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71c7f74a-2e9e-40a5-875c-3d0305da1d04/glock_19_gen_4_trigger_spring_install.pdfIn PDF document text
    • http://nidubopavoxu.rf.gd/91107310245.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/zudakilojigab.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/html_css_javascript_php_mysql_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/114a6611-c013-4aa9-a88d-59c7da943f3a/delonghi_magnifica_review_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/acido_acetico_usos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3247e8a9-b2d5-4e86-aed6-39b18286f9a9/66281839543.pdfIn PDF document text
    • http://fipaliwabalutu.rf.gd/morule.pdfIn PDF document text
    • http://duvojawakupo.rf.gd/amundi_etf_msci_emerging_markets_fact_sheet.pdfIn PDF document text
    • http://lewinozed.atwebpages.com/lejugoxovifim.pdfIn PDF document text
    • http://rupegofiminatef.epizy.com/bonufozobokewowazenuv.pdfIn PDF document text
    • http://modedavap.epizy.com/zimevanipudakuxazugufukoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d116edd-c523-4602-87b2-26e2ec75f80f/does_xfinity_have_whole_home_dvr.pdfIn PDF document text
    • http://sigedasubaduvep.rf.gd/how_to_charge_everstart_marine_battery.pdfIn PDF document text
    • http://zopomotur.epizy.com/wuwuvitano.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/befinukomubup.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA7 5212 bytes
SHA-256: 16c2c19458497ef78c34cdc3fce61d68bc9fdba2bc8930e214f947c4b10660e8
font_01_sfnt_off0000fd58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD58 10560 bytes
SHA-256: 1ecdf445f6ce0fe967dc265ad32277803cc1fb5f4c272e2ca558daca05e566fa
font_02_sfnt_off00012167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12167 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3