Malicious PDF — malware analysis report

Static analysis result for SHA-256 56fda05d23156c7d…

MALICIOUS

PDF

83.8 KB Created: 2021-08-23 19:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: afd7cdb4a3441504057999fde4aa99cc SHA-1: 476a27a47995a0f2a5af64b9ed4f5651ce67d22b SHA-256: 56fda05d23156c7dcf9d261cb1edbe42ed4d0023d731e6a3ddd7723b6a5379f5
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, embedding numerous URLs that point to compromised websites and disposable hosting. The primary purpose appears to be directing users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=one+sample+t+test+excel+function PDF link annotation
    • http://22vek-omsk.ru/fck_editor_files/files/zinapi.pdfIn PDF document text
    • http://fedime.org/imagenes/35911034116.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/58323451074.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/38398198930a30ef8d01ab0c5b7fc550/46256817518.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/tupisejetorafepigakoxosa.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/o2je6qvlevgjc70vm66n3vic3s/17430675712.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/76760707214.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/jijaz.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608987d1729ad---dagopabalimugajawevu.pdfIn PDF document text
    • http://peoplefineart.com/assets/202108/files/20210820113830477750.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/1b83f39c3be6623f8d6b21b4fdc1b9a3/junupusap.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/76887493421.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/62dfc17e08e0695270f39a5ee804aad8/fozumolenibapakuj.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/7aa8ccc0ac017b73614ab6da2d847489/bimuzegilexoxagavizimu.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/4th43okn45qnfbu9jgiffa9ong/binepisefezagob.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a37e6e479b8---37195466771.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/16248416718.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a388f001df9---80351976823.pdfIn PDF document text
    • https://kristinanamaste.eu/files/12571395256.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/71701554589.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af3ab5f632---89678888723.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/03d0031b321f4e447ebb6e1f64aeee28/bimusipowik.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e56a5c84ed7---74572722762.pdfIn PDF document text
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/biditudefawok.pdfIn PDF document text
    • https://intrastorg.com/userfiles/file/65399231544.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_off0000e19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19C 17532 bytes
SHA-256: f16e93f02bc205bb317a94815a52923b828f71aa3e424d762ab68cfa66952a05
font_01_sfnt_off00010fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D6 10768 bytes
SHA-256: 607b19ef41095195b1a336ff9b55330cc665abf802cefa8bf0f6e90ab66b873c

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