Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e22f7de21e75ac…

MALICIOUS

PDF

79.4 KB Created: 2021-09-17 14:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b7ffd60fafde21d8130aabaddb258417 SHA-1: 1f6b519ef033f5c0521d2f262d70bd1ab37f2c34 SHA-256: b2e22f7de21e75ac952063ffcdc18661ee73e254b67ae846bd280a4d6869eee8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://drafthe.ru/uplcv?utm_term=traffic+racer+with+unlimited+money PDF link annotation
    • http://aqcorth.specialty-match.com/upload/files/fenetegivimevisenak.pdfIn PDF document text
    • http://iranjobex.com/cache/fck_files/file/73462085677.pdfIn PDF document text
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/49061753331.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16139d2b918bc8---fifodiremuvoviwafu.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/21386237886.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/10783256194.pdfIn PDF document text
    • http://poiskvod.ru/images/file/2578584982.pdfIn PDF document text
    • http://fijiembajak.com/uploads/ck_uploads/files/75980369007.pdfIn PDF document text
    • http://cesvil.it/filesUploads/file/12720952511.pdfIn PDF document text
    • https://aarushimukhwas.idealviews.com/userfiles/files/76668925887.pdfIn PDF document text
    • http://sdsenlex.com/upload/files/bumazuwoko.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/migitolo.pdfIn PDF document text
    • http://lidaoxc.com/upload/files/jedozuxijogaluberowu.pdfIn PDF document text
    • http://arkystudio.eu/userfiles/files/dorezugababepowete.pdfIn PDF document text
    • https://losaltos.com/wysiwygfiles/file/53141852717.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/movajatinixupur.pdfIn PDF document text
    • https://xn--90aweabvm.xn--p1ai/ckfinder/userfiles/files/tejimopogapopezem.pdfIn PDF document text
    • http://allivecoat.com/userData/board/file/58176105148.pdfIn PDF document text
    • http://www.florentmaussion.net/userfiles/File/suvokivumajuxin.pdfIn PDF document text
    • http://pjzhengwang.com/upload/file/20210905_213630_188.pdfIn PDF document text
    • http://studiorestagno.eu/userfiles/files/55052623896.pdfIn PDF document text
    • https://varida-tech.com/ckfinder/userfiles/files/78398199067.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210908015135_459301131.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1ad2c8981---37399592643.pdfIn PDF document text
    • https://www.hkha.org/ckfinder/userfiles/files/wizuwik.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_off0000d24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24F 17212 bytes
SHA-256: 7c0974141d8d8a7eebbbbcad593568381f4b973d9b747d133821b3f00977094a
font_01_sfnt_off0000fee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FE 10836 bytes
SHA-256: bf92d85fe643cf9779efe29535a9538e91e759349735c345c89019014b19e605

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