Malicious PDF — malware analysis report

Static analysis result for SHA-256 86dc30091ac48f9f…

MALICIOUS

PDF

81.0 KB Created: 2021-06-28 15:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 192e5605802a6e8d6f6dc00e3a2b3f67 SHA-1: 08d44396eed4b8f74b648906dfef17a9ad5a9e29 SHA-256: 86dc30091ac48f9f91880337fa9b100cbc7e0fcee8343a00674aecff780a1c4a
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting. The embedded URLs are designed to direct users to potentially malicious content, aligning with a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://littlepearlspublishing.in/data/eimages/file/54503015419.pdf In PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce932be9621---66585890714.pdfIn PDF document text
    • http://allycatering.com/userfiles/61701834568.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/4663c59a4b91aa41941456bcd548baff/17777313633.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/j5163t1pbheupmi67kgu7c3n64/xepusejiligitaxogulu.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/2021429418246965.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/d374c6b18361cee00a59bb7c5d217e65/madis.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/1b537de72b0dd3ca939f8c7b81b4afd2/gureboman.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/d40c9g8u10vio60ftvfjjtdscr/tefazaponikebivasap.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/c39c79ca6eb7d2acec474c7d6963a572/37830931522.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609182c774f79---68776990497.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/oae72asbkf4a2l01cfmtjpamrj/79937503938.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/6b47f24a00d32eb794adf5f97539a05f/nejuv.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/zudobax.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7ae07dadc---4747677027.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/11886489080.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/nb184rsvs9v2lirebgf9bjo4eb/92926968289.pdfIn PDF document text
    • http://ydis.kr/userfiles/file/190653159242.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/76307326739.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/d749558ceeb6be06ff67d4b31861bc04/jimajuxovirova.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc4073c2b8---safubebugowijitozikujored.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/biwekaletab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=james+ward+brown+complex+variablesPDF link annotation
    • 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_off0000d8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF114 10960 bytes
SHA-256: 178e37a262a78a2a8d37096642ccd490cc5394e09a39a562071037a7e5c9bcb2
font_02_sfnt_off00010a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A40 17084 bytes
SHA-256: 57cb7be006dd7373d37cd471d45fc78f7bda03c5173abb18e84453fe6e380129

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