Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e9627b6bbca1661…

MALICIOUS

PDF

77.2 KB Created: 2021-04-05 10:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 12b7f436be21358b65007566b6cbb3fe SHA-1: ecf6328f52111d3cfedc21588dfe8200ae1b5ccb SHA-256: 8e9627b6bbca1661a9c685125e79de829c0a09dd4dc7e1aa86f4a89de24eddd9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with several pointing to suspicious or unknown domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/wix?keyword=relative+age+dating+worksheet PDF link annotation
    • http://foropemewefuwif.22web.org/zuxeguwimimolekupepoxu.pdfIn PDF document text
    • http://lotto-investclub.com/avaya_phone_1416_voicemail_setupomagf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414849/normal_5fdc6fe297fce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377116/normal_5fe5ae76be887.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://zozamowewideno.mypressonline.com/antidoto_de_organofosforados.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/what_is_the_white_queen_based_on.pdfIn PDF document text
    • http://jisutuxoxaza.medianewsonline.com/volleyball_speed_and_agility_drills.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409818/normal_6002a787d7f56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450043/normal_60232cbbd207d.pdfIn PDF document text
    • http://rikafitamedad.medianewsonline.com/vagevifurenobupujakurelu.pdfIn PDF document text
    • http://difijeso.iblogger.org/31609404297.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/09c4957d-37dd-43c2-bca2-2276a270a341/fiwojol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f22b5e68-c251-410c-95c6-371fb3be1b3a/mental_status_exam_speech_description.pdfIn PDF document text
    • http://juvumutat.rf.gd/rivepavedevogorisi.pdfIn PDF document text
    • http://migegifixabo.rf.gd/87233421074.pdfIn PDF document text
    • http://ladofinaziza.epizy.com/nuxosobe.pdfIn PDF document text
    • http://lifukobokana.rf.gd/2141175884.pdfIn PDF document text
    • http://ledaruwevegoxu.onlinewebshop.net/sugilikejine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb40272-3e48-4ba8-a517-d85e97e6c655/nelezasukavuni.pdfIn PDF document text
    • http://mexorilurolepap.rf.gd/bahubali_tamil_movie_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8edcf5a-4786-43c1-b86a-f2aa2319db6e/lexuketa.pdfIn PDF document text
    • http://xumutopefar.rf.gd/sig_sauer_p229_legion_vs_p226_legion.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_off0000eaae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAE 5312 bytes
SHA-256: 6c83234a0e924044423ffbcf606fda89d712824bf710bf3c65b9f670f615ffb2
font_01_sfnt_off0000fcd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD3 12644 bytes
SHA-256: a1ee92be6828b2140af4e0a6698bbcc50ba11ffc9aa370631125c83093535d51

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