Malicious PDF — malware analysis report

Static analysis result for SHA-256 726292b6b09401ce…

MALICIOUS

PDF

71.5 KB Created: 2021-10-04 00:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 81dd2472d00128c671a338e1140e0203 SHA-1: df5362f8aa0c20ceac2eaebb2421cf5823ad43a7 SHA-256: 726292b6b09401ce9fd28b74eff7f0b3ee7faef2965fb0ea34f9b90e36389c34
156 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a phishing or malicious redirection scheme. The presence of a link farm on compromised CMS upload storage indicates an attempt to obscure the true destination and leverage trusted domains for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://ivepe-elearning.gr/assets/UserFiles/mainHome/file/56545425729.pdf In PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/cjqp9cpmuj89i24o878j750ht0/98301857165.pdfIn PDF document text
    • http://keramann.ru/uploads/files/59552297435.pdfIn PDF document text
    • https://norservis.com/files/files/powuzepuxa.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614e93ed84758---7447412853.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/3273197980.pdfIn PDF document text
    • http://kkc1.org/htdocs/cljr/data/files/43610386467.pdfIn PDF document text
    • http://shiraz.sk/ckfinder/userfiles/files/lananiwuvoge.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/xigakelop.pdfIn PDF document text
    • http://getsolarny.com/userfiles/file/24148916752.pdfIn PDF document text
    • https://ana-jsc.com/upload/files/85010851660.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/wogezotepujokoxomotap.pdfIn PDF document text
    • https://renewone.de/files/lugajogajumukawigame.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/zumegeb.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cfbff9e890---23316953622.pdfIn PDF document text
    • http://clinton.abwingsmd.com/uploads/files/53168744689.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c766e3de05---refuvexujaxo.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/b46c760f368d7ed22ea58f0b56e9293c/wusif.pdfIn PDF document text
    • https://baoholaodong24.baohohoanglong.com/userfiles/file/detabituwojesovazanojiv.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/5cc309bfd3b377f2c35c9a0b2e5bde86/nibefisog.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/97505659371.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/99913490302.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/49122edfbaa21bf8fb605e587220ca4b/marulefemumuraj.pdfIn PDF document text
    • https://xylemleads.com/userfiles/file/29681991992.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=twin+t+band+stop+filterPDF 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_off0000b29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB29A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000caac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAAC 17568 bytes
SHA-256: fb56e3b3139df9d07eb56246eb18984e792b0ba36985532f3a8f0d5f537f4f84
font_02_sfnt_off0000f81b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81B 10680 bytes
SHA-256: 94675fafcc050978983a36fe08be35d630422762a11d53d151b2999c48c4624f

Open this report in the interactive analyzer, or submit your own file for analysis.