Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4cd8d21569b8568…

MALICIOUS

PDF

67.3 KB Created: 2021-09-19 16:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e1d681f0e604c4aa76e59b3ec6adfa07 SHA-1: 02c32df986301f26eaf678a58087387e4dbfdc99 SHA-256: d4cd8d21569b8568ba67533f5c2ecb5bc2312fda1edf5713c4b5840b1198b93e
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an image-only design with a clickable action, typical for directing users to external URLs. The presence of numerous external URIs, including one pointing to 'crewmak.ru', suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://crewmak.ru/uplcv?utm_term=temple+run+2+unlimited+apk PDF link annotation
    • http://rsti.biz/files/fck/file/papuburujok.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/bojalejute.pdfIn PDF document text
    • https://tunhuaduytan.com/upload/userfiles/files/dobadovade.pdfIn PDF document text
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/pigoriso.pdfIn PDF document text
    • https://cryptobasics.biz/uploads/files/pevodekawarufixojali.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/80251035071.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/mimogufefag.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021090117073973499.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/xereke.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613b53281368e---93363894730.pdfIn PDF document text
    • http://gapp.fr/medias/files/bivefetitubi.pdfIn PDF document text
    • https://siltri.com/fck_upload/file/masinadalur.pdfIn PDF document text
    • http://1night2day.com/UserFiles/file/12572199552.pdfIn PDF document text
    • http://cdkuysuujk.handysociality.com/upload/files/towikajalaxusodejogonix.pdfIn PDF document text
    • http://dentistturkey.com/image/files/gemobenoxixumaxalugodase.pdfIn PDF document text
    • http://nemalipics.com/54293275121.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16135e127d9f44---6340891775.pdfIn PDF document text
    • http://pronobile.de/catalog/file/xexuxo.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/jinuvosexowaduvegozusume.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/peludajulatewo.pdfIn PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/rimajepise.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/75644475417.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_off0000ae27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE27 10540 bytes
SHA-256: 8c3a7fd6040ab7a8c35d280735c6c4eb277e7fc13d9740000d65931a7a0b42de
font_01_sfnt_off0000c627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC627 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000de39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE39 13812 bytes
SHA-256: b608823e83f812c0840463eaafa668e9736b319deb52f78e537b9f6536d5bb0f

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