Malicious PDF — malware analysis report

Static analysis result for SHA-256 392ec7ea3c754788…

MALICIOUS

PDF

82.6 KB Created: 2021-03-18 16:24:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: dc686bc31443e46ed577eed3a32d570e SHA-1: aeddfa3dcc1750968de90787099ddea7e109f972 SHA-256: 392ec7ea3c754788bcaebdb24969254ca3cbe0cf88f603420ffc1be17a266c52
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 0.9992

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/wix?keyword=smith+xp+guide+osrs PDF link annotation
    • http://lurobur.iblogger.org/13186980970.pdfIn PDF document text
    • http://digovin.getenjoyment.net/analgesik_opioid.pdfIn PDF document text
    • http://gebigulexejo.sportsontheweb.net/nsp_bonafide_student_certificate.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/sopotegegeretuwagi.pdfIn PDF document text
    • http://zozamowewideno.mypressonline.com/web_designing_course_free_download.pdfIn PDF document text
    • http://gtmedis.com/9275466976xdfmk.pdfIn PDF document text
    • http://nujuxogo.iblogger.org/biomedical_engineering_colleges_in_tamilnadu.pdfIn PDF document text
    • http://finipupote.mywebcommunity.org/john_deere_2653a_starter_motor.pdfIn PDF document text
    • http://biniwitovo.mywebcommunity.org/grade_9_algebra_worksheets.pdfIn PDF document text
    • http://snegny.com/pokemon_fire_red_gameshark_codes_master_ball_in_pcm9p1y.pdfIn PDF document text
    • http://bufo.online/4722203953629p8x.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/f9a36fdb-669d-4bd2-a180-a6280609c82a/english_phonetics_and_phonology_an_introduction_philip_carr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f7c793-c720-49c4-b690-513e0bc31510/back_titration_practice_problems_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbd4ead5-79eb-4fed-857b-bf61d2154d15/pesomovapen.pdfIn PDF document text
    • http://vekoxoke.epizy.com/filariasis_treatment_guideline.pdfIn PDF document text
    • http://povusesa.rf.gd/58397509359.pdfIn PDF document text
    • http://zepurudevivo.rf.gd/99438786701.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/diono_radian_3rxt_convertible_car_seat_black.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/531fa4c2-dcab-4902-9488-e90aee6d7ce1/11029557487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36d55e9e-88cf-4bd8-be8f-c67bee0899e8/lejezadasov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88e56e00-2e28-489c-acd4-af83bc11f5d5/nitup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e41f4225-dda5-4216-b109-1454fda423c2/todibifomiwobineliluwuzos.pdfIn PDF document text
    • http://lixugafepujijoj.onlinewebshop.net/54777721136.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_off000105a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A5 5304 bytes
SHA-256: 20ca109bafbfa3a4813a50c23855e9c3f0a8c27d82c363a9fb0cc4b3a091582d
font_01_sfnt_off0001178c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178C 10960 bytes
SHA-256: fbbea00adeacb98e1a3b601752106879326a577f68d9cbc9803c907221a215a4

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