Malicious PDF — malware analysis report

Static analysis result for SHA-256 a692ee64860129b8…

MALICIOUS

PDF

96.5 KB Created: 2021-09-16 21:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 477648bbb79ae8ee3a8d64e83863f69f SHA-1: a52a6b1a9ba394ec48bed71e2c51c2e1467a1f17 SHA-256: a692ee64860129b851498a4f72be992a93d321aa249f4ef2a0f80fd45033ecb9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The presence of external URIs and the overall structure strongly indicate an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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://medvor.ru/uplcv?utm_term=love+you+to+the+stars+and+back+full+movie+online+123movies PDF link annotation
    • http://etnorom.hu/pictures/rumuwuvudizijebagositopal.pdfIn PDF document text
    • http://primethailand.com/ckfinder/userfiles/files/51666612659.pdfIn PDF document text
    • http://aptwash.com/userData/ebizro_board/file/65203211727.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/75cac08ee36e11af6e53fc5cbcd7ba05/riganisamag.pdfIn PDF document text
    • https://vyaspublicschool.com/ckfinder/userfiles/files/32627180305.pdfIn PDF document text
    • http://propertiesforrent.com/userfiles/file///54988377502.pdfIn PDF document text
    • http://artwatch.ru/userfiles/file/nobapasalaboliporoxenexo.pdfIn PDF document text
    • http://makeyourpartnermelt.com/userfiles/file/44208297780.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6b1d5b8d8---48394297291.pdfIn PDF document text
    • http://devveb.net/userfiles/file/53771928373.pdfIn PDF document text
    • https://autohausnschmidt.de/userfiles/file/sijuxuzuz.pdfIn PDF document text
    • https://maturana.cl/upload/file/lezogobesudezefiw.pdfIn PDF document text
    • http://vibestedu.com/_UploadFile/Images/file/dipujozivegovoditivux.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/60130471057.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/nazuduvavesozunupinogova.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/28993947986.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/jaxujogoduje.pdfIn PDF document text
    • http://murasakijr.com/uploads/files/3625354191.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/78258681193.pdfIn PDF document text
    • https://zaindu.drogomedia.com/files/galeria/files/lokalanufikegavewum.pdfIn PDF document text
    • https://macroedunet.com/userfiles/file/kusajavenil.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/raluwigiwit.pdfIn PDF document text
    • https://solelane.com/ckfinder/userfiles/files/zadiwupunafuxavipubozulu.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d7da92b1e9---31258667476.pdfIn PDF document text
    • http://edins.net/userData/ebizro_board/file/26579917683.pdfIn PDF document text
    • http://iproperty.ae/userfiles/file/zilezuvujegus.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_off00011237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11237 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A49 17796 bytes
SHA-256: ba01c680d4d88f1e218e3ddab8537e015975f35f655fe83b0f9a3f65bbdb6f4b
font_02_sfnt_off0001586f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1586F 11552 bytes
SHA-256: 51adb2f37c2058d187c3310b097ce29e94e6021e38ea953fe21c25e7469c4cb0

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