Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b7672158ca1e87a…

MALICIOUS

PDF

73.1 KB Created: 2021-06-17 16:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6eee1ad3329059a90c73539e9e18ecb4 SHA-1: 62b08341faaf65b21526efa69b9af2e5b28466eb SHA-256: 0b7672158ca1e87ac6904583d3c2a94644497b1e5f2b237485b7b0c3eaf3df95
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to various compromised WordPress sites and disposable hosting domains, likely intended to host and distribute further malicious payloads. The embedded URLs suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=engineering+drawing+by+kl+narayana+pdf+download PDF link annotation
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/8cb7e14e80049e98dff496827622ad6d/63756692589.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/sajixiserifuxewezerud.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/bc7452e82f7676d83033d633be4dfecd/46095171422.pdfIn PDF document text
    • http://meta-min.com/files/sudifipukifi.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/40151456457.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/os917hn4m8oar5suuot5augegk/xurer.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/86737690525.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/f407b736037febc28c4d16ec562a8454/nuwarimaperifodupikajudug.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/1d2399abef58fcc1ae7da89e96f33bfb/29409805380.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/73de304eb845b55823704bf903bfdbbb/dutoxudamomame.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b048d45d937---24835532024.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/girokorogokonowe.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/nugujidufaf.pdfIn PDF document text
    • https://aitalk.vn/upload/files/fujiburodupizadavonat.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/3626938e9a2e5ec2fef5a5edf09a54c3/kunebabon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC65F 5384 bytes
SHA-256: 11fc4fce8786f3563f90094335274bb7a472eb0b03f574a09d5e5132bd0f68b7
font_01_sfnt_off0000d8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D4 6264 bytes
SHA-256: ae9aa6d71455e20ea32dcdff7f3c23b3366ead496d3ebaf05607690112bf978d
font_02_sfnt_off0000e933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE933 10044 bytes
SHA-256: cfb54b03370cf711ef1c134f1f5e2e83c3832e615fba8865cbd09373f11e0ff5
font_03_sfnt_off00010b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B98 2608 bytes
SHA-256: 1bd6645c1f9074025765a621709e8f6785fc36c48f00859863d4b316a8cfc9da