Malicious PDF — malware analysis report

Static analysis result for SHA-256 fecc05380c72264d…

MALICIOUS

PDF

71.9 KB Created: 2021-09-25 11:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0dccb28f49819abf9422ec98eeb60c07 SHA-1: 75350c5ee464201b9079c783369b02e158845013 SHA-256: fecc05380c72264dfcd9a5bc4f227a9557b09e818725f2915af75d32d51b7b85
156 Risk Score

Malware Insights

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

This 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 a link farm pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting, suggesting an attempt to obscure the ultimate destination. The primary goal appears to be redirecting users to external resources, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://immobilieninvestors.eu/userfiles/file/62561635579.pdf In PDF document text
    • https://408of53crownstreet.com/assets/media/files/12835704114.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16130f96567bbb---zovavipizunanepilixiko.pdfIn PDF document text
    • https://valgott.com/images/userfiles/file/zaxizazokiboriloj.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/luvarewebobedevigedoxito.pdfIn PDF document text
    • http://dgone.kr/userfiles/file/20210916145123.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/507a1440ae0ea96702592a2b850be646/37065275982.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/96452068989.pdfIn PDF document text
    • http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/73880008097.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/58522567800.pdfIn PDF document text
    • https://bi-kiesabbau.de/cmsimple/images/file/1189975837.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/1d6a7d5fa4153896c4e549cb15778be4/jepabogenuxudipivo.pdfIn PDF document text
    • http://wenyanchem.com/upload/files/jeboferuziz.pdfIn PDF document text
    • http://inannamsao.com/uploads/files/jojupibizafurabugid.pdfIn PDF document text
    • http://smileorganic.net/smileorgfarm/filesupload/File/95438979694.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1dd62c5ab---warakudobosifef.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/36864765429.pdfIn PDF document text
    • http://crestviewshopping.abwingsmd.com/uploads/files/xenapegojefarobasim.pdfIn PDF document text
    • http://www.syrahresources.com.au/application/third_party/ckfinder/userfiles/files/mepuso.pdfIn PDF document text
    • https://mandarinkinesiska.com/userfiles/file/39040206910.pdfIn PDF document text
    • https://signatureshreyas.in/userfiles/file/molujudu.pdfIn PDF document text
    • https://nabijdefossa.nl/upload/files/tomadojuda.pdfIn PDF document text
    • https://netlandschool.cl/files/vidaniboli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=ata+mlbg+changer+apk+download+linkPDF 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_off0000b3c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDD 11092 bytes
SHA-256: 03fb74e6a2a2c4d6a0cc9922a8452a577feaf697a7dfb3ce32ad30e195a4bb8a
font_02_sfnt_off0000e525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE525 16712 bytes
SHA-256: 70d93218661c2ad9f165ee9abd28c8eec3cfe9ab8a135edeeaccd5ee3cc22ae9