Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b02924f2bb87def…

MALICIOUS

PDF

86.4 KB Created: 2021-06-26 10:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: daf26a5e4ce6944edaa7d3864bb25e2a SHA-1: a634b84447dffbc3246a663458454fb9d7a8d3b5 SHA-256: 8b02924f2bb87defea6620f3dd7fa9d1f5fad10b88bf93d2819ef254f7176e6b
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1553.005 Security Software Tampering

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links to external sites, many of which appear to be compromised WordPress installations used for hosting malicious files. The document also contains instructions to disable security software and provides a password for an archive, indicating a likely attempt to deliver a second-stage payload. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a4deb3a06ef---zowaputunogibotageruwot.pdf
    • http://webinside.pl/userfiles/file/67860158410.pdf
    • http://tokyoto.pl/UserFiles/file/69010585864.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b8bd3a67b---77786855673.pdf
    • https://paklya.su/design/img/upload/file/jepobisivif.pdf
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/7653763079.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/2ea41678971baa036d891a3d73f2c2a7/68082506234.pdf
    • https://zanhotel.ro/beficientconsultingFiles/file/56965194268.pdf
    • http://noospc.ru/SITE/files/editor/file/davunezasisifavomilatumat.pdf
    • https://hoangnhataudio.vn/media/files/74391673917.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088f3bc430d3---66265016970.pdf
    • https://anctools.com/ckfinder/userfiles/files/54944723537.pdf
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/padal.pdf
    • http://dharmapremipariwar.org/userfiles/file/kilibiwo.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9fa018910---zovogodilewefusobuludaz.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f0fedd3fd---mekokesosimarosakuka.pdf
    • https://equator-maritime.com/userfiles/file/57761030115.pdf
    • http://au-coeur-du-temps.com/userfiles/file/wafelis.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a82781c6afb---pimobovimuromevasamake.pdf
    • https://ludifrance.fr/userfiles/file/76401579105.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/545322dcf072df2ff65947448594d09f/95659962833.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608349b492108---74235325683.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607608019e6a8---gidojenegolizux.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/008tgvpb6j31trjidfb1s97edr/zixurexuxiv.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=miracle+box+2.58+crack+without+box
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea55.bin
28f597fac96d6f9ee99ee7f103457021ecf9545c8dda9ccb2e7e85899efb4b18
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA55 11096 bytes
font_01_sfnt_off0001048c.bin
8dc7997be4901a2d5ed7593860d283aafa035633785ca357ced5f4315e107a44
pdf-font-stream PDF embedded font (sfnt) at offset 0x1048C 17480 bytes
font_02_sfnt_off00013272.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13272 16792 bytes