Malicious PDF — malware analysis report

Static analysis result for SHA-256 400d78845756728f…

MALICIOUS

PDF

68.4 KB Created: 2021-03-07 09:19:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 45d3dd72069264ea0e72703cc468eb11 SHA-1: baa22b7bba13ae850d058ef57ca3624ee5895814 SHA-256: 400d78845756728fe718f55805c4a54c359a77c4f95c270b97a2d228c18859bf
126 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier as malicious. It contains numerous external URLs, many hosted on disposable domains or link farms, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the PDF structure indicate it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/wix?keyword=zuma+apk+uptodown PDF link annotation
    • https://molegogadamo.weebly.com/uploads/1/3/4/3/134341439/jupofe-vaniru-gefarafewaroke.pdfIn PDF document text
    • https://worojipe.weebly.com/uploads/1/3/1/3/131382243/vaxewotur-funobibanamuza-lerifosepox-xawoxufinuzelov.pdfIn PDF document text
    • http://mixed-rootwork.com/4487520105511q1u.pdfIn PDF document text
    • http://getbuiss.online/2014_nba_champions_rosterqm8ht.pdfIn PDF document text
    • https://nujusokomofevak.weebly.com/uploads/1/3/4/5/134503883/d33532.pdfIn PDF document text
    • http://megegizob.iblogger.org/nedokugowufekamadimi.pdfIn PDF document text
    • http://latencfsrt.space/46878512402g5qbi.pdfIn PDF document text
    • http://bevubupowin.22web.org/depedupemigevepusezuji.pdfIn PDF document text
    • http://tameenegypt.com/all_in_one_messenger_appj8t4z.pdfIn PDF document text
    • http://mopasiwamosul.iblogger.org/destiny_2_leviathan_raid_guide_solo.pdfIn PDF document text
    • https://xexibuwowixuzu.weebly.com/uploads/1/3/4/4/134455615/rixokig-fevelimuvovig.pdfIn PDF document text
    • https://tidukefawa.weebly.com/uploads/1/3/4/8/134851120/3797830.pdfIn PDF document text
    • http://anarchymedya.com/roomba_550_partsdwn2l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sunivope.rf.gd/58899853263.pdfIn PDF document text
    • http://zewuref.rf.gd/gizaxufodi.pdfIn PDF document text
    • http://viruvivena.epizy.com/are_all_uppababy_vista_double.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab77e337-82f2-4036-b888-7ab3acbf9464/10570609320.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0e69dd8-c0f1-4845-93a7-814458a64a74/35898402259.pdfIn PDF document text
    • http://gumikibe.rf.gd/kudilagibelagaseperowume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b661ed41-f0f9-4ac0-ad7a-8fe71babbe94/54510772246.pdfIn PDF document text
    • http://dowuxufab.epizy.com/man_myth_messiah_free_download.pdfIn PDF document text
    • http://fosixijikalapi.epizy.com/gatufigewu.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_off0000d1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B4 4912 bytes
SHA-256: f5e13ace53b9cebeb2d2c291c28eb0c52d245d29c3f5e5f66f7c8dfdd10ab02f
font_01_sfnt_off0000e26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26E 9820 bytes
SHA-256: 872a4d5e1eeb66149da9670df10c17fcc89bdfb5307506cdf1a5bef8292ca520

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