Malicious PDF — malware analysis report

Static analysis result for SHA-256 2adb165a49038687…

MALICIOUS

PDF

74.3 KB Created: 2021-09-20 13:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: eebe1bf6b601b2c0a9009fcdf44070ac SHA-1: 3d96af49e801b6b390165a872ad3d2ea803d8deb SHA-256: 2adb165a49038687630a7764570bf48b9e1dcab747528101e6b81b80dc552a09
116 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised websites and link farms, indicating a phishing or malware distribution attempt. The heuristic 'SE_CALLBACK_LURE' suggests a potential callback phishing or tech-support scam pretext, further supported by the presence of multiple external links. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://smidgel.ru/uplcv?utm_term=pubg+mobile+global+version+apk+download PDF link annotation
    • http://thefarmatarapahoecounty.com/userimages/20469423315.pdfIn PDF document text
    • https://hotelite.in/userfiles/file/32230613888.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613f98340e34b---52082855368.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/80232342880.pdfIn PDF document text
    • https://www.rougeindigo.com/ckfinder/userfiles/files/sexaba.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/b05c3974aca50bc236bc6ac76389dc7a/woruvug.pdfIn PDF document text
    • http://wonikquartz.com/upload/editor/file/1631336601.pdfIn PDF document text
    • https://31app.com/userfiles/file/96380313420.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/99969681604.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1c430e084---2576914299.pdfIn PDF document text
    • http://novichiha.ru/pic/file/nabazidumukigonibuzoweki.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210916114719_0lyux6.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161393d1b21298---62483376374.pdfIn PDF document text
    • http://www.astmalek.cz/obrazky/file/30014829900.pdfIn PDF document text
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021091723513780554.pdfIn PDF document text
    • http://sancheonglittletheaters.com/upload/userfiles/2021/09/files/210910202257.pdfIn PDF document text
    • http://haisushitogo.com/uploads/files/75690772460.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/dejudijuvofepikabet.pdfIn PDF document text
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/15386940383.pdfIn PDF document text
    • https://avflash.nl/upload/files/bejivofig.pdfIn PDF document text
    • https://vonia.mikludava.lt/images/files/97188563448.pdfIn PDF document text
    • http://bon-mar.com/fck_user_files/file/bagizurorexadufifud.pdfIn PDF document text
    • https://mimpishiosatu.com/contents/files/vizazupuv.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_off0000bdca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDCA 11124 bytes
SHA-256: 89bfb6ac1982e7ff9479104311c185ae16541bf8ce3450c4220efb33c319471d
font_01_sfnt_off0000d751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD751 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF63 16948 bytes
SHA-256: e77495f1c8b6ae7368f6a40d00193cea1c34f3bf58ad581d42fba243c3c88f9d

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