Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cf5a8f015c143aa…

MALICIOUS

PDF

79.3 KB Created: 2021-09-16 09:36:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f32f4acfc1107bab284696ca8bde121b SHA-1: 0cb1c408f95b1fd83b7ba837e8ea02f581ca5429 SHA-256: 7cf5a8f015c143aa22564849b52ee3b93e4a2e123b5eee620b86c9b25a092534
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, with high confidence. It contains numerous external URIs and is identified as a link farm, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics strongly indicate an intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://oniceh.ru/uplcv?utm_term=vola+live+sports+apk PDF link annotation
    • http://luchetti.it/userfiles/files/vasebuvi.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/wujalavav.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/1564815990.pdfIn PDF document text
    • https://k85shj16h-561lt.com/contents/files/kugolifaxilubowubam.pdfIn PDF document text
    • https://penzion-pod-rozhlednou.cz/img/file/bipupexu.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/kamosi.pdfIn PDF document text
    • http://djpress.pl/Image/files/wakide.pdfIn PDF document text
    • http://darstin.com/userfiles/files/65317550253.pdfIn PDF document text
    • http://inprovitvenezuela.com/ckfinder/userfiles/files/19239393079.pdfIn PDF document text
    • https://aglogistics-bo.net/userfiles/file/78697857326.pdfIn PDF document text
    • http://golfvillageonline.com/userfiles/file/ruxovaf.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/59902807499.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/vutefizafuvesawovefegeruw.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/4439958990.pdfIn PDF document text
    • https://www.funes.gob.ar/ckfinder/userfiles/files/gidapeduxixofu.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/tevopanikefoxukik.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/11829148ef22d3b92caee24690594af5/65383683530.pdfIn PDF document text
    • http://sxnqx.org/upload/file/Fl202109151920413588.pdfIn PDF document text
    • http://pitchdecor-construction.com/user_img/files/futovinekiweketixadibiwi.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/41246851376.pdfIn PDF document text
    • https://khmernative-rice.com/userfiles/file/61417312612.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_off0000d218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD218 10268 bytes
SHA-256: 2d9f19501eb6ca8d387b0fdfe652d94a38d940a91fd2252f417e83c13ef503a2
font_01_sfnt_off0000e964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE964 18124 bytes
SHA-256: 844bedd3075e4f2c68386cefd6c4b2b0803f7b7f930614b6d66b870a957d1437
font_02_sfnt_off00011832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11832 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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