Malicious PDF — malware analysis report

Static analysis result for SHA-256 730df90cc1e23e47…

MALICIOUS

PDF

92.8 KB Created: 2021-06-26 02:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 07cb9d3c3e27aefb8b22b27e9890a7a5 SHA-1: dd1aa6a9846275ebd0cc9445449f8e82f86574d9 SHA-256: 730df90cc1e23e47c717c61475bd892dee264f82aa0786ad459d88d464f5108b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and links to compromised CMS upload storage, suggesting it is designed to lead users to malicious websites. The presence of a link farm on disposable hosting further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://drafthe.ru/uplcv?utm_term=english+articles+to+read+pdf PDF link annotation
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa86c82166a---32780299115.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/3488821784.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086cf8f964fb---bovor.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rezuwimumoguj.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/5bc742580a3b8604dfe001acd35c1891/46805245195.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/70uoem5e3o016e70ckaoutj383/33632100074.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607037d95c1d8---gamosoxu.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/96135370843.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/af33gffp9qlieoo2r2vt49lpd0/wotojilevuturef.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb9ae2ceae---majegakadofeb.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/66248751852.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/2334567597.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609400e12fbb0---zitisegulimaseze.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c281e00faa9---47387590285.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/vufodomafibe.pdfIn PDF document text
    • https://coil.hk/upload/files/30970942148.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/6d00631e405940702bca9e2eae9a24b2/zazax.pdfIn PDF document text
    • http://bjallstar.com/upload/file/798064030.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/a36bc6381b86e1f15c73ab55e3804933/sexeboxuvalakorep.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/djvnqqs40t0npn74op3i7haphn/52426322655.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/xenonirokapimunuduvom.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16090745e206c1---pazugose.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/zufodobefuge.pdfIn PDF document text
    • http://jkohut.pl/file/ronetekejoluvobobazelaxiv.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/2m03nir8d2mq64hmnscmp024k3/felajigavefuwuro.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/0bf0afdcd985e7febbf9a4c890c57289/vopud.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789afa8b042---23101714721.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_off00010742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10742 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F54 17520 bytes
SHA-256: 68c5a49d32f1413c432f54287a0fbed74c01c03e9e566699cb673defbf76b195
font_02_sfnt_off00014cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CD1 10884 bytes
SHA-256: b9277f54561f43e24daa2892a535c71e4413934eda49fcc45a82fdb1bc7d5673

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