Malicious PDF — malware analysis report

Static analysis result for SHA-256 db80a79f700de6c7…

MALICIOUS

PDF

69.6 KB Created: 2021-09-16 21:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 16314c49dc14e69e9a4f7234cd01f2c4 SHA-1: c309291c4396a4f6c70f80dbb42e54d27ce2bbb1 SHA-256: db80a79f700de6c70fd7458469fd201a0046acbc079e5907822aba1446673477
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF exhibits characteristics of a phishing lure, including an image-only design and embedded links pointing to potentially compromised websites. Heuristics indicate it's a link farm designed to redirect users, and ClamAV detected it as a phishing trojan. The presence of numerous external URIs suggests the primary goal is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://wastran.ru/uplcv?utm_term=t%C3%A9l%C3%A9charger+need+for+speed+most+wanted+apk+obb PDF link annotation
    • http://allprintusa.com/admin/images/file/sovitujumimemetikisafa.pdfIn PDF document text
    • http://kd-council.com/upfile/files/duditudewuvusexego.pdfIn PDF document text
    • http://gianenricofabro.com/userfiles/files/jolaxiluvala.pdfIn PDF document text
    • https://khyatiinfotech.biz/ckfinder/userfiles/files/67010870228.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210904155821.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/c739a03d0a493e9fafc83efb10069e05/79842345828.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/09/files/210912171610.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c482e6cc13---kipipusumofileg.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/sasuwamalapexomowid.pdfIn PDF document text
    • http://borik.customreal.sk/data/files/vimodatip.pdfIn PDF document text
    • https://doxity.ro/ckfinder/userfiles/files/42498334656.pdfIn PDF document text
    • https://mallorcaboom.com/res/wysiwyg/file/10883714323.pdfIn PDF document text
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/sewiselolatef.pdfIn PDF document text
    • http://theponghop.com/upload/files/97129471063.pdfIn PDF document text
    • http://manenshop.com/upload/files/dasikepibedikotijuji.pdfIn PDF document text
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/1795428516.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/piwoboraketigenosofo.pdfIn PDF document text
    • http://ibb-online.ru/f/file/zorixoj.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/89729292786.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6fd547d5a---ketezuwizerasuwawa.pdfIn PDF document text
    • http://sieuthihatgiong.vn/webroot/img/files/67007760271.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/53700616847.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613c838af223f---nirajoluma.pdfIn PDF document text
    • http://inica.org/files/file///duguxirisuvifob.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/13560559785.pdfIn PDF document text
    • 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_off0000b30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB30C 13808 bytes
SHA-256: b5f4cc89b99af3cb555072b2c6bc7377a6b5f2d837458867ba035a47b628d346
font_01_sfnt_off0000d53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53E 11412 bytes
SHA-256: 4fbaba8a6cb529ca3dc322d7ab9aceb43b82126385ef54e8f5f34527eaecfb71
font_02_sfnt_off0000ef6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1