Malicious PDF — malware analysis report

Static analysis result for SHA-256 7290c354f42e449d…

MALICIOUS

PDF

86.0 KB Created: 2021-09-09 19:07:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 45d2e496c5599f240abdf5b24af08af6 SHA-1: ca098f973064b2dfb8ffaf8682aaaa732841e2d3 SHA-256: 7290c354f42e449d7d161415f14a441c8dadb963b321e5d098fb42fe67b2c5e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics and link farm indicators further supports this phishing and redirection pattern.

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://allytemp.ru/uplcv?utm_term=disable+permissions+android PDF link annotation
    • https://drlalashow.com/php/billboard/uploads/file/19992598616.pdfIn PDF document text
    • http://finalbrand.cz/upload/file/duwamozujejepulilusujona.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/0ff42904c8cff55bb870336612d56ba7/jegomosenine.pdfIn PDF document text
    • http://boissee.fr/userfiles/file/bugafefopu.pdfIn PDF document text
    • http://cmi.nfe.go.th/ckfinder/userfiles/files/movosajajudo.pdfIn PDF document text
    • http://alacarte-grafik.de/userfiles/file/warejivumaxadigusonikeke.pdfIn PDF document text
    • https://oreopay57.com/ckfinder/userfiles/files/10277321559.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/7a8b9p45nijk14el60f72ravmk/tazoxubasugeniramudup.pdfIn PDF document text
    • http://an-professional.ru/img/files/file/xafovuli.pdfIn PDF document text
    • https://praktijk-fix.nl/userfiles/image/file/56889429468.pdfIn PDF document text
    • https://tour-paris-guide.com/cite_imgs/file/72694679213.pdfIn PDF document text
    • https://groupburuemas1.com/contents/files/53134915470.pdfIn PDF document text
    • https://ofcourselc.com/admin/uploadsfile/kagomaziza.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/jutim.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134c399b6e79---bemetetowimipapege.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/a085a0735899856666ccfadb65742017/25434607457.pdfIn PDF document text
    • http://mebel-moscow.com/content/xuploadimages/file/towudebolejidesupopuvug.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/1215743049.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/72487648111.pdfIn PDF document text
    • https://indicaperu.com/userfiles/file/89423689355.pdfIn PDF document text
    • http://oaklandscreche.ie/userfiles/files/39068138584.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_off0000ee9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9B 10596 bytes
SHA-256: 24db144d8be74c40983f60586767a23b06f7711c8c18056f7633fc97a0d36b2b
font_01_sfnt_off0001067b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067B 17096 bytes
SHA-256: df1deaa8521952a3e6e04ab30836331128d58782bf65b544a7e617ed1db040bf
font_02_sfnt_off000132d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1