Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0a7aea0ba3287b…

MALICIOUS

PDF

89.3 KB Created: 2021-07-05 06:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e1727ed7491bac1e5e241553aacfae68 SHA-1: a1147c4b8bdb48f3567a751bdeb53cfa5176dd62 SHA-256: 0f0a7aea0ba3287b1e6b8a19af914df2906a349fc250cbdae5a4ec46e3a17e6b
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://nomylo.ru/uplcv?utm_term=civil+police+officer+previous+question+paper PDF link annotation
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a445443fd5f---55986398285.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/k2mueuhubgdpb99qsldv2uc3v4/tavopagadajola.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/xuxamume.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a6d07e20e---98287536204.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/146803c7e46d2165af4052aa9446f789/rewutimogekiwomuguzukaru.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bf40b392059---rojodege.pdfIn PDF document text
    • http://www.asslar.de/downloads/bazofodoluxuwuzipixafexi.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/2vs7n5386im7pphtn2gt04kfkt/zowatitiwavumexajomev.pdfIn PDF document text
    • https://santechnikosdarbai.lt/images/files/25590361417.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/fidf6usfkmutm17bq52s4ht5k6/2836504945.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf86f9ead80---29949377497.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb6b9599df---xexelimabiximoki.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/f08ecf97d5e0a90a2e849614ebdc370f/62602333472.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160de694ec2f66---4593378537.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6b9f15c37---66365088341.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608010ce3b4ad---businib.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609897e78f466---filabe.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/55241286414.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/93908053865.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/7aac34f11691ce279eca8a96e6d10450/dazagijovozute.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d92098d490---26480443157.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/861952d1b55d0e57dc06a294e547ef79/rewakepemozevon.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/6b05c10c107f2ca58e52ff562c50aacc/51634035327.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846369c8d56---tuzufujalamilu.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160944e721d7ca---825805387.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/0gh3n3v5bahg3rh8jg3c8j82m1/88229021426.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_off0000f87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87E 10816 bytes
SHA-256: 5459de15b0ef05cef811242a815f3941a3eb6e3253e9b839c43e024f556e35a3
font_01_sfnt_off000111a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B5 17136 bytes
SHA-256: 985e8067aebf385519ecba037caffb713ad36c56bae5611b74980d133c746b0b

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