Malicious PDF — malware analysis report

Static analysis result for SHA-256 115895ec25fb3695…

MALICIOUS

PDF

68.0 KB Created: 2021-09-27 07:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8d45331f282a94d473712680cf9f8343 SHA-1: 16ac725e320745bcd3ff9a09e69a4a595f9b8c32 SHA-256: 115895ec25fb3695add4b97b14d257ea9e65b044d4f9e1b8bc7f01d8f25d41a8
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-only content, typical of a screenshot designed to hide a clickable action. It contains multiple links to external domains, including one algorithmically generated URL, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 68 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://coretry.ru/uplcv?utm_term=gta+5+mobile+edition PDF link annotation
    • https://limsurdua.com/contents/files/21210461085.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/bbd6b766ecf29be3d6ad440b9055d59a/tawokedijorudoseg.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/wasizesutimun.pdfIn PDF document text
    • https://iskoruma.com/upload/ckfinder/files/4897169176.pdfIn PDF document text
    • http://snuhonors.com/userfiles/file/zatawesepozekukugokim.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bfe1bf1946---31695369189.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/36061321105.pdfIn PDF document text
    • https://superiorservicesandsolutionsfl.com/nbloom/fckuploads/file/49085666904.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/migegejasivitu.pdfIn PDF document text
    • https://jechrina.gr/FCKeditor/userimages/file/lekududusukenojotavepobo.pdfIn PDF document text
    • https://arteziano.ru/ckfinder/userfiles/files/betusajozudixupegavumaduj.pdfIn PDF document text
    • http://scarpatti.com/files/30094645834.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/80138777273.pdfIn PDF document text
    • http://xn--38-mlcqjbufcz6h.xn--p1ai/userfiles/file/vipududozib.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/63978282888.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/lewodesigaze.pdfIn PDF document text
    • http://futboltotal.net/images/files/najoxaredu.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/59672279857.pdfIn PDF document text
    • https://k85shj16h-561lt.com/contents/files/junudixizokakowugunonud.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/75617102131.pdfIn PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/kekobunelumafalope.pdfIn PDF document text
    • http://ducthanggroup.com/webroot/img/files/66074890303.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/vabaluzewebajufonetu.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/50163954194.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_off0000afb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFB2 10456 bytes
SHA-256: 4ca04b3609394680a699d4e121ff6d2250ce1219323a1a81411a92f790bd4035
font_01_sfnt_off0000c76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC76D 14212 bytes
SHA-256: f6ce57feb8b482c63ff8973f6d3c1903a94201455305bf60cf375cf01860b938
font_02_sfnt_off0000eaf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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