Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc56ed0c6049ef43…

MALICIOUS

PDF

89.3 KB Created: 2021-06-27 12:49:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6792928d53cc5b081beee32921ece623 SHA-1: 3041853bb53262ce76cbc37e3c4777d0700164c1 SHA-256: fc56ed0c6049ef436536e536ed6962f67fdb1b6b2fc72fb954fb98f4ee9d6dd2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous compromised WordPress sites and disposable hosting domains. These links likely serve as redirects for phishing attempts or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://samtekelektrik.com/files/98506591661.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160d5a254de0ba---tedirizizadokev.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1fad3b17f---72527067754.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/bacc6669457633bf1038ea9420237bd1/vujaxolul.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607998bfa0cc7---tikudixaxusolodogot.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/bdf4e7d18356745708d793732f43853c/78416266836.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088ef23a5ec2---72684840716.pdf
    • http://learnazia.com/fck/imagesfile/86532472346.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/7b70ec40356e17461a60285c2a1f4cde/vobuxivalepekozakal.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/hq4lu5hi5hak24r43laf1vsmd4/90785086467.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb2e352983---wopafu.pdf
    • https://universal4shipping.net/userfiles/file/vafenizaduzonafapege.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ee07ddd6e---92966386424.pdf
    • http://digifast.cz/userfiles/kufirojisogejadokorozos.pdf
    • http://botosani.ro/img/uploads/file/77127373144.pdf
    • http://carszana.com/image/upload/File/kagapugurus.pdf
    • http://detikakdeti.ru/img/file/78694462967.pdf
    • http://n2nlah.org/UserFiles/file/71689864847.pdf
    • https://circolodelpistone.ch/userfiles/file/kizonipaxikewijawemiju.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa3b45bafe---bukuregufez.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16076a3520687f---95567062804.pdf
    • https://gachbinhduong.com/upload/file/duwupolafuwojuk.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/lqg9qg257g05aetoievd9s5fa5/32949969754.pdf
    • http://sewakendragroup.com/userfiles/file/teradulosifazimigajowiw.pdf
    • https://moto-trend.cz/public/files/fck/file/teronodevonoxepite.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=bright+star+next+to+moon
    • 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_off0000fc27.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC27 16792 bytes
font_01_sfnt_off0001143e.bin
da516927d1490ac478a97d94495772b8702f92a05d951a6508a8a59199f6ffe2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1143E 10664 bytes
font_02_sfnt_off00012c88.bin
8f76d795351064deae49c4db3bfbabfba87ac4f997e3695d9dfd3a3fca7893c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C88 16936 bytes