Malicious PDF — malware analysis report

Static analysis result for SHA-256 122f88d7737adcd1…

MALICIOUS

PDF

77.4 KB Created: 2021-09-22 18:37:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: adb7d5dbe0bacb8e9cfc6daa946d5563 SHA-1: bbd3c303b07a342377edb1475c93e78829b1e8e5 SHA-256: 122f88d7737adcd11f45e226ca695b9b3fe9ab28d9d61ce8e123c8528365b007
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful websites. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://ketchas.ru/uplcv?utm_term=inshot+reverse+video+android PDF link annotation
    • http://smingames.com/ckfinder/files/63772359561.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/77393932006.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/66018641302.pdfIn PDF document text
    • http://na-bytecek.cz/UserFiles/File/xafoxanase.pdfIn PDF document text
    • http://positiveforce.in/uploads/files/12040042205.pdfIn PDF document text
    • http://dailygameresult.com/editor/UserFiles2/files/3877131361.pdfIn PDF document text
    • http://studiomalpocher.it/userfiles/files/26573409862.pdfIn PDF document text
    • http://sicilalluminio.it/userfiles/files/zukesabebaxukoj.pdfIn PDF document text
    • http://dpsszczytno.pl/photo/file/71713547442.pdfIn PDF document text
    • https://konteshamamotu.com/userfiles/file/koradoxiwepo.pdfIn PDF document text
    • https://madeinstlucia.com/userfiles/files/mojamoti.pdfIn PDF document text
    • http://kukubara.com/zdjecia/file/42570747606.pdfIn PDF document text
    • http://lishasurgical.in/ckeditor/ckfinder/userfiles/files/48730966109.pdfIn PDF document text
    • http://www.yevres.fr/ckfinder/userfiles/files/85706285302.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/fujuvokomegevizebakekape.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/68094784150.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/36682dd7f99ba873e6eb145b9a9b67d8/kapiwavuginu.pdfIn PDF document text
    • http://sergeybazarov.ru/file/25499257845.pdfIn PDF document text
    • http://homestationrealty.com/userfiles/files/3940860861.pdfIn PDF document text
    • https://glamweddingdesign.com/userfiles/file/gakikonare.pdfIn PDF document text
    • http://lecostationery.com/files/file/53934082952.pdfIn PDF document text
    • http://infoegrafica.com/userfiles/files/dasaxalozexata.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_off0000cbed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBED 10316 bytes
SHA-256: b202109b7d70a24e51de425049ca81055adf91f5a9eb714426cd0e0a2c257269
font_01_sfnt_off0000e31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31F 17524 bytes
SHA-256: d96723dae0a29b9d0d8de3042e32f6cd0f318c0afa032b4fd2fd4b84fc07ec2b
font_02_sfnt_off00011011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11011 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.