Malicious PDF — malware analysis report

Static analysis result for SHA-256 914f5625bc1ebadf…

MALICIOUS

PDF

94.0 KB Created: 2021-09-15 14:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 894a76a2ea579e82e2be2d797cd13c25 SHA-1: a5b83c43da2a021570cb7d1d4203e8e4bb523edf SHA-256: 914f5625bc1ebadfa184279d9f8cf5d4a7df117dc51f946e1a0ea243c62bad64
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://bdsps.org/slbdavbatala/userfiles/file/rabagetupudamegusimavis.pdf In PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16136aa3c0dda2---winawejoditakirukijoras.pdfIn PDF document text
    • https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/577724762.pdfIn PDF document text
    • https://liho.cz/UserFiles/File/japewinepakabu.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/rexatekoxumap.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/vavapekibosalulenelevami.pdfIn PDF document text
    • http://almawred-sy.com/files/adminfiles/files/bogomibawu.pdfIn PDF document text
    • http://coniperfumes.cl/js/ckfinder/userfiles/files/99526436749.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16138a356d3879---21792494575.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/55114672009.pdfIn PDF document text
    • https://nomaquito-travel.com/editor-images/turuki.pdfIn PDF document text
    • https://il-gusto.com/images/file/dunapezoxebidaxorax.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161318df817eee---ruwomo.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/tivalagumupirevemifiz.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/fomon.pdfIn PDF document text
    • http://portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/56708947879.pdfIn PDF document text
    • http://zenobiacultura.it/userfiles/file///betovep.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131be717796c---9003235912.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff59985967---kevasifonuwub.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents/files/rewedobatopizikaf.pdfIn PDF document text
    • http://varvshistoriska.com/file/lalikubanozonewajozaxoruk.pdfIn PDF document text
    • http://bctlorraine.org/userfiles/file/5046775355.pdfIn PDF document text
    • http://bretagne.annuaire-regional.com/ckfinder/userfiles/files/kezevigigume.pdfIn PDF document text
    • https://www.zolmedis.lt/ckfinder/userfiles/files/wuxafinedito.pdfIn PDF document text
    • http://etkenkalip.com/files/zosazez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=wifi+hotspot+not+working+in+androidPDF 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_off00010564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10564 19976 bytes
SHA-256: d2f135e16fa9d9b5c86ee3f7ba50c4a00eeaee2de4683f8e2bff515fcc401989
font_01_sfnt_off000139bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139BD 10768 bytes
SHA-256: 437381eb4b5c1089c546481e1f0b660fd5a03d2313e1d10a74b7c63a24c60853
font_02_sfnt_off00015258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15258 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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