Malicious PDF — malware analysis report

Static analysis result for SHA-256 46666e86fadf4868…

MALICIOUS

PDF

108.8 KB Created: 2021-06-29 06:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 359fbea6bfdeded05a83587445b6f942 SHA-1: 253c67b9222b528ae91b2135336dbbc1f0d41a5c SHA-256: 46666e86fadf4868e55286c29eccab13e88da89b7ac8c0f59268fbf8d6c03a16
156 Risk Score

Malware Insights

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

The 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 numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious sites. No scripts were extracted, but the presence of embedded URLs and the link farm structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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://huntic.ru/uplcv?utm_term=center+for+adult+and+child+psychiatry PDF link annotation
    • https://mimpi1pusat.com/contents//files/22529215027.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/9u4adqbvhgklo8gep033lt11dg/sinodopitegexopilasu.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/3db0dfe8caf3306f22299ec6273f9e94/79207698492.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/0qits12k5i0kvc4u9bt6mo2bpr/nosinamevizupi.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071bc9abcdc0---31960085368.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d59b5300d---moted.pdfIn PDF document text
    • https://arerp.kr/data/file///83165476766.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607568959895b---65217334460.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/ii3ccj1k64hnkjkuos346cchi6/zakixubu.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/44243122636.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160747f7bb4e7d---dedelanal.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/9fc989e292da1ff78af7a0f426aa6c6f/93945308540.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/6599fc11a47ef9a71fb5a7c52a28664f/86623218475.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa40056e39---palixijovisotabibow.pdfIn PDF document text
    • https://kolbandibileklik.com/resimler/files/83463860333.pdfIn PDF document text
    • http://dietetyka-24.pl/images/files/buputafo.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/sfmbcrf1pqtp3qo7u8v09fgo2q/61181570124.pdfIn PDF document text
    • http://chonburi33.com/userfiles/file/3516719452.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/55310570582.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/df8fab75dcab8bc5e03dea58dd7aa14d/mifufana.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/56orkqtalaqi7ogc201ec2nmk1/12486066851.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/kexarewajufimosukik.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16091898908a7f---biler.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16088a6d969900---75334512684.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c77bef131c0---patijonesimipibeja.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/javikapezagabafanopetis.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_off0001441b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1441B 10960 bytes
SHA-256: 1f7f1ea7cb193453596cf481aa06d7039262ac1d19615c4a2b23bb413cf5ad9c
font_01_sfnt_off00015d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001759a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1759A 19032 bytes
SHA-256: c5b0af59a6ec7f88bc38d53e4fa5c3fe0b59394999ca5c492b31b06d2cf1e13b

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