Malicious PDF — malware analysis report

Static analysis result for SHA-256 a62ed9564dc33a37…

MALICIOUS

PDF

88.4 KB Created: 2021-08-20 05:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 785e579113150d5f8fd1af07cd235a18 SHA-1: 240d1680b3d031f48d2ad97c6600fb16eac96f1b SHA-256: a62ed9564dc33a37cf982083c61032edcb163bd307e64a69166f1bd44d114d50
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and disposable hosting. These links likely serve to distribute phishing content or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://philabc.ru/uplcv?utm_term=temple+run+2+mod+apk+download+apkpure PDF link annotation
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/59864eb60f09d39e8c28055c7e4a0e3e/72390827379.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/a0pd3gmdmqtgn5dpptu7p3u3is/65017884431.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/63282941661.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c9e0029f6---tufiwolotuziman.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a733ae7f18---52493613378.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/vumolesewaroperifujupig.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607162b3400a9---gujixag.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/40f07988d0884fba9c50b14e68d294d5/33383391698.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/1820144787.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/f41b13e878440a968538daa7c6725816/darufegemetufiw.pdfIn PDF document text
    • https://jetaime-shop.com/files/80361634936.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079864c9e9bc---sosejawovitezoled.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/5b16dfab3b608520857042702de1fb20/nuvijiseviro.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/tininifidavidodofad.pdfIn PDF document text
    • https://atrax.hr/files/kudinubawasevakuwa.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/q3j7l5v1c1feln4qlf23tspav5/41902170924.pdfIn PDF document text
    • https://booknowrentalimo.ch/userfiles/files/10137884011.pdfIn PDF document text
    • http://ontis.sk/editor_uploads/system/files/zokojajixabibelepug.pdfIn PDF document text
    • http://sclifeguards.com/clients/16854/File/zezusizokajasoxafow.pdfIn PDF document text
    • http://gdaniec.com/upload/files/26275209739.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a579ad188f6---tipowuwavurexovo.pdfIn PDF document text
    • http://gintaras.cz/userfiles/file/jifepuxonuzopoxekisuf.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/71764202569.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b06415e9304---17362739108.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/gativas.pdfIn PDF document text
    • http://buyo-g.net/userfiles/file/15963439357.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBE 10556 bytes
SHA-256: 48eebaf4d5ca71bcd5fb60844515966aa35a0391313a60ece4b5cee26ee8b5f1
font_01_sfnt_off0000f5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DB 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_02_sfnt_off00010b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1C 17596 bytes
SHA-256: 437f8c55f9cc87cbdbb0a73ac2e499ba589daa35ccd7359da5a30ebdfc519202
font_03_sfnt_off000138ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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