Malicious PDF — malware analysis report

Static analysis result for SHA-256 f219a9fe816a3140…

MALICIOUS

PDF

72.2 KB Created: 2021-09-17 04:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 65ce128fb926e472eb1276249750e6ae SHA-1: 9a164649e84a0a6fdba7905d46ee3d22d6273c4f SHA-256: f219a9fe816a3140b637811ff6934a33d0b4b28826b12098face06b00efaece9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are hosted on compromised websites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://oniceh.ru/uplcv?utm_term=android+box+slow+wifi+speed PDF link annotation
    • http://geombiagioschettino.eu/userfiles/files/kijasagod.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/rasirotevamubijo.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/27765857277.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/bmkep1niampa517b2e4o5baba3/bifevujo.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/vbun4t1ssmlrtpqi5nt71k99al/fipaxugam.pdfIn PDF document text
    • https://dakhoathienhoa.net/images/files/jexajozemotu.pdfIn PDF document text
    • https://jewfri.kr/files/image/files/mawikebijojerexowakelo.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b63fe2d14d---debozovegebuk.pdfIn PDF document text
    • https://waelfawzy.com/userfiles/file/In PDF document text
    • http://pbpharm.com/upload/files/1674468055.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/qrh4p6er8t3dm4g47fdf4rgsn2/varebasiko.pdfIn PDF document text
    • https://tigaintan.com/contents/files/40439945400.pdfIn PDF document text
    • http://www.bc-arman.kz/ckfinder/userfiles/files/86300170785.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/84673649583.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/govewujupulutapoku.pdfIn PDF document text
    • http://samtle.net/ckupload/files/wifona.pdfIn PDF document text
    • https://digireg.es/upload/23752558890.pdfIn PDF document text
    • https://digireg.cz/upload/pezejefudofivuvuma.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/pigaterate.pdfIn PDF document text
    • http://93564497.com/userfiles/52338816329.pdfIn PDF document text
    • http://villahetzwartepaard.nl/survey/userfiles/files/karakiwajibitibewobofa.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/69300568760.pdfIn PDF document text
    • http://gojjang.com/uploads/files/8672968344.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/4fdca0a1857fabc2e2563de676d2b49f/purejegewamugufuraxuzufi.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_off0000b96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB96F 16392 bytes
SHA-256: 63c601c8f92fb3fdce64227a24aa85c51ed1b88e49c1d82a749d146106bdd361
font_01_sfnt_off0000e377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE377 10540 bytes
SHA-256: eaaa5e2c8929d52a8e9e3a51089d8320c5cbb02b35ebf480e60ae90baf32a0ae
font_02_sfnt_off0000fb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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