Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bbe0e0884a44174…

MALICIOUS

PDF

83.2 KB Created: 2021-09-03 08:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e591e8bfe038d6031fad17cd6592eb0e SHA-1: dc53a02805dc85b69d552f6b2229b92e6121b935 SHA-256: 2bbe0e0884a44174dd71da5380bfe2168822c6369b345bb4433b850f0e575785
164 Risk Score

Malware Insights

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

This 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 part of link farms or compromised websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for a large number of links, suggesting an attempt to obscure the true malicious destination or to distribute phishing content widely. The presence of 'utm_term' parameters in some URLs further suggests a tracking or campaign-oriented approach.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://drafthe.ru/uplcv?utm_term=bursitis+subacromial+fisioterapia+pdf PDF link annotation
    • http://mxagproducts.com/upload/browse/file/palimesimiw.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/runewopisivedepipukup.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/161144c9c2f050---sogag.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-8-8/20210808075743383320.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/57629660075.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/99363720570.pdfIn PDF document text
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d8375f52b---22665368278.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/17683991307.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/21a1798b61e78452716948191383fe28/nabovezegilufojefuj.pdfIn PDF document text
    • https://btegypt.comfile/goxamol.pdfIn PDF document text
    • http://barahi.com/assets/userfiles/files/97997704386.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/60538944581.pdfIn PDF document text
    • https://rzfmuhasebe.com/userfiles/file/25620315394.pdfIn PDF document text
    • http://jarosi.hu/files/file/70710151004.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/bugiwufalinotiwitesofum.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607764e5023d3---vurug.pdfIn PDF document text
    • http://mwcapital.net//ckfinder/userfiles/files/vefutidujo.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/90633480021.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/89473655054.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/motog.pdfIn PDF document text
    • http://dongsimkindergarten.com/upload/files/xuropupevorofofot.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071efa0b09a6---kikuxugagelezotibeziruki.pdfIn PDF document text
    • http://caydinhlang.net/userfiles/image/file/82998696235.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_off0000de84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE84 10972 bytes
SHA-256: 59477018b7726379f2e06c4d5de450f0723602ea718acd0ee873d045c4b7798b
font_01_sfnt_off0000f7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 18172 bytes
SHA-256: b204913cad00050e38e5715278638ad5f60311d32c3406faa807ed68634518e4
font_02_sfnt_off000126f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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