Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba06eadfa6338d4c…

MALICIOUS

PDF

86.7 KB Created: 2021-06-25 20:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: cce14cde526e0002d1af0a83645482fa SHA-1: c9371982add934fb50562c3694a69ba79afbecf6 SHA-256: ba06eadfa6338d4c2caaf4e9caea2d1521fb059f6f4b50c80dc1c3acd55cc37c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised WordPress upload storage, indicating a phishing or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, but the structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://infrive.ru/uplcv?utm_term=story+the+lady+or+the+tiger PDF link annotation
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7bbabe91a9---65319383304.pdfIn PDF document text
    • http://skyfestival.kr/ckfinder/userfiles/files/pebokamuvimenudo.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160868eac00f8c---nidetejameme.pdfIn PDF document text
    • http://cecev.com/stockages/files/pidakot.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/rtve11m5mvb64hc1ddtpsvq727/99591628849.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160770c871c36c---wejilowapubitiligitid.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/73ed5dec38d20280453c2656fbd2071a/bawamijawuruva.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/12554761452.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/noxufurikinexejubopuwo.pdfIn PDF document text
    • http://vodnik48.ru/content/file/32779961796.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/dcf4bdd71c75a2f6d55fca59143194d0/dapukodutezagadunakutul.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bc7cd1c07---gepotuluxopopovuzojojeb.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/0d93e69a74b2e2238427fd5265db1474/5851178502.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/45aac22fa532e925480d952e3726a446/jowomo.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ac066702a---95795024370.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/99248184771.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160be4f3a00976---bilonajaxosijepedapir.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/pppbda83db37ukc3trp2bdivof/39894871642.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/8e79686d7f8ffede7b9e96b46b10ff1b/botaduv.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/401b5280d31de1c2fe8da9fb184dad51/kujukafazuxipitukisanoki.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a347912aaa5---tabobevixemabejav.pdfIn PDF document text
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/v4so31lrlq8srucegkdtgetkhu/dodapafumediwivimuwut.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/lrsrvug3ti38nk6a72balimo8h/70145683832.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/dobewevukebixogoxalup.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/walagagire.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/22ff8862856b9f280d630f93da714f09/tomawulobogaxagojadolipif.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001090a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090A 10444 bytes
SHA-256: 0b9d4c02b4dabcf3e85520defeb713f617be6684124212357e4c90facd2411f2
font_02_sfnt_off000120ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AC 17128 bytes
SHA-256: 7f48fc1c491818990051a79b651e95a6098d19678d7bdf52fdfe322b37e3a7a0

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