Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe0f7912627c2e2…

MALICIOUS

PDF

83.6 KB Created: 2021-09-16 09:55:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 63de0e6c58507a54118ff6ab6add650c SHA-1: 7ee08bcf9c00c81efc133e5f32b737f4c8c15dc5 SHA-256: 2fe0f7912627c2e2e58914727a89d4a48a4108a61ee3b17ac7be1f005455f4d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites used for hosting files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of 'utm_term=download+typhoon+apk' suggests a lure for users seeking specific downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://markzone.az/wp-content/plugins/super-forms/uploads/php/files/d70t4p3bcrhr5smkf9jhnik499/71069587060.pdf In PDF document text
    • https://szekszardportal.hu/userfiles/file/18851977588.pdfIn PDF document text
    • http://ultrabeauty-ff.ru/userfiles/file/64137987495.pdfIn PDF document text
    • http://parateam.cz/file/86609764853.pdfIn PDF document text
    • http://ergakiland.ru/files/files/33478519482.pdfIn PDF document text
    • https://scout-educationguide.com/userfiles/file/gituvawagare.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16130a41ea3764---meribeled.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382207260b9---jajolekadakukugugiga.pdfIn PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/4677545781.pdfIn PDF document text
    • http://confidenzacsapagy.hu/upload/69108763556.pdfIn PDF document text
    • https://rpaxis.net/userfiles/file/81183173782.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/70429477922.pdfIn PDF document text
    • https://aynispirit.nl/userfiles/file/gavigarul.pdfIn PDF document text
    • http://phanmemerp.vn/attachment/files/mejibalidam.pdfIn PDF document text
    • http://vertracapital.com/uploads/files/50542967959.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613dbe26253bd---fuxuku.pdfIn PDF document text
    • https://www.db-ynox.fr/ckfinder/userfiles/files/7859170300.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/0686d3f62cb381e2166598b0b81db4b1/lajuwuwanafunirebun.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/9016644159.pdfIn PDF document text
    • https://imagebrandstudio.com/userfiles/file/47811216675.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/wegunew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=download+typhoon+apkPDF 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_off0000e1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EC 18336 bytes
SHA-256: 500448e97b101f251465d271a5bf00a3e1e8e0564a1ce1b9b42880fda6e660df
font_01_sfnt_off000111b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C9 10292 bytes
SHA-256: 7b41092cf9b5a53c6a2d72c830b6f7be9fcbf455d92ddeb0a699886bfa620a27