Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2cb68df847884d7…

MALICIOUS

PDF

82.2 KB Created: 2021-09-22 19:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c5ef047a97cd488d59d64a224284795c SHA-1: 2b29dcc0143144c191e555b0329b915ffafa424a SHA-256: f2cb68df847884d787919999f071504e138ff337c66cbbfbcd98db322c1aa7ee
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to compromised websites and disposable hosting. The embedded URLs, such as 'https://pistant.ru/uplcv?utm_term=fifa+21+cloud+gaming', likely serve as lures for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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=fifa+21+cloud+gaming PDF link annotation
    • http://cobe-ing.it/userfiles/files/37267374611.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aac575f1ab---68395024952.pdfIn PDF document text
    • http://technimexvn.com/images/ckeditor/files/puxekibetufekututuluxudux.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9588d742b---zeroxasabilibumegovu.pdfIn PDF document text
    • http://jadever.vn/Images_upload/files/dalasuzikowul.pdfIn PDF document text
    • https://sangolongphuong.vn/longphuong/news/files/73746012180.pdfIn PDF document text
    • http://quartierdete.fr/uploads/fckeditor/file/jawof.pdfIn PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/77442853292.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/7co8ski1iln1nkdil53fk98j87/49865228088.pdfIn PDF document text
    • http://indianspringhomes.com/userfiles/files/wipovuvigevazojuni.pdfIn PDF document text
    • http://isvpro.com/custom/files/33952856728.pdfIn PDF document text
    • http://craft-personal.de/userfiles/file/70055542405.pdfIn PDF document text
    • http://linza-market.ru/upload/files/lulotuvujamefaj.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1614970b273e6a---70977783793.pdfIn PDF document text
    • http://bjqyms.com/filespath/files/20210905075004.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/juzigegupamazoke.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/lekoratimuwubatulibuduxe.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614082f1a0586---1434490489.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/60210763203.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/sifebuko.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/161319b4ce58ec---83774264119.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/19975129335.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/8637791911.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_off0000dbc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC2 18308 bytes
SHA-256: 57d724606d47da6fd4660e098003459677bb08727a52f09b1b11d00d544e38e2
font_01_sfnt_off00010b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3B 10572 bytes
SHA-256: add065f3e1eab612d91a73fd7487fc1b4e87af3f370fa4a0d0b4bf41c3f848de
font_02_sfnt_off00012322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12322 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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