Malicious PDF — malware analysis report

Static analysis result for SHA-256 10111a229f54a02f…

MALICIOUS

PDF

93.4 KB Created: 2021-06-28 14:04:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d2012680393ae35957ca012ce6952857 SHA-1: 78cd28a993766c0b3c8a618197b984c7df44c02c SHA-256: 10111a229f54a02faff7fd67c38399d64dd390d1131c687118030617f19f15fd
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple external URLs hosted on compromised CMS uploads. The presence of numerous links on disposable hosting and the use of UTM parameters suggest an attempt to obscure the true destination and potentially engage in SEO poisoning for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/fi8m44erp121u8okoosf9h3ol2/fugezozedetewukilukemo.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/59abcbbe97817e0591d0ff7144d358d9/sitazetegutonumabixiv.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16082f8fe72e97---67264462652.pdf
    • http://czdashan.cn/uploadfile/file/2021050104582273499.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c238c18b383---40861642191.pdf
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/62855f02e213a1e91a6d947a4ca8d423/95168431305.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/d4a4eab32454229851cf15eb8d245075/sirimudaka.pdf
    • https://biovuspharma.net/userfiles/files/96171512681.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6db236a19---nopotimajed.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160816cd11d3e0---xixipem.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5b40ccdb8---jomojufub.pdf
    • https://catequesisnavarra.org/guiarte_userfiles/files/44637748737.pdf
    • https://combrooncom.com/contents//files/punak.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0bc37b6865---relowafixezozot.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d0d339433---9866328080.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16073795c6358f---68082485514.pdf
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/4f4106014cdfadb87b1290cbb35c7094/45452191954.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850db0a3f35---15174598928.pdf
    • http://sosnovgeo.ru/userfiles/file/fasajeki.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086bfd3f17b6---jukijorimoxitifelafopafek.pdf
    • http://daiichilogistics.com/uploads/news_file/27907315488.pdf
    • http://fondationmonetoile.org/clients/0/0e/0ecfe6182781ff486fe5156d2e85c11d/File/pafox.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/lhv2a8bqp4s0ou40idrd1h0on6/rukezededopag.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2a3b51325---gokivad.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=the+power+of+six+pittacus+lore+pdf
    • 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_off00010830.bin
c47dd27fe5f1eb8d9f2864801c384604f3761c8b8bc74f982f01bcb639ca081a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10830 17772 bytes
font_01_sfnt_off000136dc.bin
debfc65b68971665abd2334e2c9378c303400523a6355f05ac2bc7af54020a12
pdf-font-stream PDF embedded font (sfnt) at offset 0x136DC 10864 bytes
font_02_sfnt_off00015036.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15036 16792 bytes