Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01657791f9e522d…

MALICIOUS

PDF

78.4 KB Created: 2021-09-03 09:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bd391277a93830398fc036ef5f96481a SHA-1: 3689b5393670186bc1e91cd5e7bad55620c80489 SHA-256: d01657791f9e522de3a0f30810f3fd746fc9663751d4c5c970745f98b17d89c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://argekaucuk.com/nbg/upload/files/90830292051.pdf In PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/fajasodezijilubaxukexeb.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/2b3hcd7odpnsgeq6pilcoh8pem/kilomigudufivudad.pdfIn PDF document text
    • http://abc-tel.ru/data/File/nagulegaribe.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/xivadoledefaju.pdfIn PDF document text
    • http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/nakodetukid.pdfIn PDF document text
    • http://daiduongmetal.com/uploads/ckfinder/files/4886998110.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/fedabuselisazevas.pdfIn PDF document text
    • https://goodline.by/userfiles/file/vobuselelamumuw.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16086a573eee8e---norikidagubajiwadu.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1611acaa271040---zemexudusiforiruti.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/pegigedoxijujowemujigukuv.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/de49a0f017bb14eaf28038be5a389f88/benevu.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/bf5828253ed6fe3217aa4f05790051da/57648508472.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/241447061013.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/jitexi.pdfIn PDF document text
    • https://notrepanierbio.ch/userfiles/file/87727499578.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160a643de1ba3d---pukibokek.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/n75r0d05sa182bknifiqt3vkd0/tusilifijajivawuzade.pdfIn PDF document text
    • https://dottoridegregorio.it/public/file/7910859614.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe91fece67---25251662542.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/cf560625fc289046b9ecf2204e385d33/93760844074.pdfIn PDF document text
    • https://newsru.md/upload/userfiles/files/81102692323.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e36c978e7b1---penixefapasokepadobirir.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/3dcaba500b77f736733d6f51336acab2/39750823877.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/16988143177.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=material+master+in+sap+mm+pdfPDF link annotation
    • 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_off0000cde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE9 10532 bytes
SHA-256: a2316eac89541505f22a3fdf4eac3cb32800b9bec10c1865a4d8b0baabc0280d
font_01_sfnt_off0000e5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D0 17888 bytes
SHA-256: c24104e9ede4c1f88604fc3f45181e4111e5d95d2356fd2e90ff5bda12d98a26
font_02_sfnt_off0001139b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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