Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d602fedb6f20700…

MALICIOUS

PDF

83.9 KB Created: 2021-07-18 19:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f2303fe2a810da462c7f79657a5ce8f7 SHA-1: e647237f4870852b00845042242ba2309296afcd SHA-256: 8d602fedb6f20700b0182a7cc3b6adf81536570dd62d24db7875ca7e90b8f769
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious. Heuristics indicate it functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://angelcabrera.com/FCKfiles/file/20401751288.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d98f0f1370---88960383389.pdf
    • http://qytbearing.com/upfile/file/sijilo.pdf
    • https://cihangirhotel.com/upload/ckfinder/files/vivozibalel.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b8a02bb65---7078478426.pdf
    • https://notrepanierbio.ch/userfiles/file/70534709253.pdf
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/57df24392d3e60763914fdbb099e48c3/55616432547.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/lt0jnsl79k0l11jrcns0kscqks/wuvexagal.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f33695a46c---31985949296.pdf
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/najelobafu.pdf
    • http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/65850298311.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/u82oknimj5g6pd1v9jjvba2p55/boxexatadijikejo.pdf
    • http://dgxzz.com/uploadfile/file/sixupebutem.pdf
    • https://peilimineko.com/userfiles/file/48850320273.pdf
    • http://stylowa-pss.pl/userfiles/file/72312374165.pdf
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/5eghoj7kt4hg06qu8to4udhd9p/91757825367.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/jal7u0jn42rphn715i5ntpe6t5/zutawufabuberemipemusi.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8e75a51a5---63746384055.pdf
    • https://projectmine.hu/ckfinder/userfiles/files/20983908549.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/9b49840edbbc2ed1976199d9975a05ce/42140221504.pdf
    • http://chromoink.com/updates/file/wunika.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/4tgbtjoobtj4pl443fqk5lo8cu/87656231787.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=moon+in+12th+house
    • 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_off0000e8e2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E2 16792 bytes
font_01_sfnt_off000100f9.bin
98a4db5927056e56bfc7f56ec4cf78e25524081af399047c51c0c7096c56892c
pdf-font-stream PDF embedded font (sfnt) at offset 0x100F9 10160 bytes
font_02_sfnt_off000117c5.bin
014ed4b94317f182b2d1beffb123ac84d17c48d6b6ddb6dc82e91f17e616382d
pdf-font-stream PDF embedded font (sfnt) at offset 0x117C5 16632 bytes