Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ba14e6b5decc2d…

MALICIOUS

PDF

70.9 KB Created: 2021-09-24 23:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ff5139ead35b30bee8135267dfe6a608 SHA-1: d0d22050d8079eb9d928d2191394ce906e093e65 SHA-256: f1ba14e6b5decc2da0a95b7eae3a84cdc3989ca898409d6155bfb343e1ac9014
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users to malicious content. The primary purpose appears to be directing users to external, potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://xn----otbbfbbknchz.xn--p1ai/sadm_files/naradavonoxas.pdf In PDF document text
    • http://capesociety.ca/uploads/files/71022535721.pdfIn PDF document text
    • https://www.xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/vukimukunotararisijura.pdfIn PDF document text
    • http://www.enjoyvaltellina.it/admin/ckfinder/userfiles/files/59299012049.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/xuwikasodisimakisenad.pdfIn PDF document text
    • https://greenlandpark.com/uploads/files/sewugetevaz.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/rosifas.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16138a57b7ecef---47110449505.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9884015378.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/9958669648.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/pazanibetetuxariluwopufam.pdfIn PDF document text
    • http://crm333.com/documentos/file/jesakamidesanejide.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/hrefqrl0v5sdi0e7gnk8ntrqoh/61702802504.pdfIn PDF document text
    • https://zlato-stribro-investice.com/upload/files/70371034200.pdfIn PDF document text
    • http://modulobase.com/userfiles/file/beninirazo.pdfIn PDF document text
    • http://halongwave.com/userfiles/file/kogawilar.pdfIn PDF document text
    • http://isvpro.com/custom/files/33888419778.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/3e96cfaafbc6c8dceca7c8690ee460c2/xawukasenodigezubetit.pdfIn PDF document text
    • http://geraldinekilkelly.ie/valupavekenufulibirazo.pdfIn PDF document text
    • https://www.grdr.org/paidel/ckfinder/userfiles/files/39542547516.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/kaledewo.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/161355779603e3---diwibudufi.pdfIn PDF document text
    • http://akekaluck.com/ckfinder/userfiles/files/kumajanoxakuto.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/dujusujejetaredajeni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=sath+nibhana+sathiya+episode+1PDF link annotation
    • 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_off0000b4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4CC 16148 bytes
SHA-256: d7af949089e66d956d6b5dd820d5582c20e5fc755c0025967c13c76fe177fdcf
font_01_sfnt_off0000dd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF591 10724 bytes
SHA-256: 4221fd09da39030faa54eadd8537fc1e6012081b87444ab948503f03f888e374