Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa29599ef9e28f34…

MALICIOUS

PDF

78.3 KB Created: 2021-08-27 11:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 42ec60f72f13124e5752643b89b7e8de SHA-1: 8be131f5b56604d14627d56dea51c2b21e697c1b SHA-256: fa29599ef9e28f34c811e5dab8299f700f12cf682e1bbc93cccadf108a23d568
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://bagstyle.uz/images/file/82635150439.pdf In PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/h5jtcudvk1v00fnt7e8mvl4i25/zixagasatader.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7cdda25b7---moluvanelum.pdfIn PDF document text
    • https://www.campacinter.com/image/upload/File/belut.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/29a2c5691a51474702ae96a2602d3a2b/39711713796.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/4de29a97a41c5724f053e4910fa794d5/12443506609.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/ximerunaxuwupotulax.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/51129916831.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/makonipemarakum.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16091311fbb0ae---72877974732.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/jo6nu93go3h24hr9fgdjhsjdig/sofezabudesoxaketuwakaxu.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d2674cc7b---53750078359.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/31470f2cec5f79d080da21b0fa5de7bc/36246458983.pdfIn PDF document text
    • https://biomisszio.hu/tmp/simewakowenavi.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/22763401916.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/30039555392.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/10261990325.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d3536786617---kisorawulufelewizavina.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/wabanowa.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/ddmmm0e26jl8bf0cqmc6uhmq41/pubufuxigajusivi.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ca4abkpov5aobs04vdmhvulfp0/kigesijuwasunobeb.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cfff85a80---raneg.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/46949348765.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/jh05gf6jgof9gn4jsmnggpj754/29347472937.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/93858373825.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/b875e6858bbf3f2fcb115c459483bcbc/40709363828.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+combine+2+pages+of+pdf+into+onePDF 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_off0000cee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE2 16356 bytes
SHA-256: b490709c90b55bdaa428a0cfaec7efef1a53d100c01d27ef9dc319b4d79ffa16
font_01_sfnt_off0000f907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF907 11152 bytes
SHA-256: e275802dd625f7e76000e78ef2e009b8235ff4ccaa50bbd10546ee40190a8965
font_02_sfnt_off000112c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1