Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e2e8918a58db96…

MALICIOUS

PDF

69.9 KB Created: 2021-09-25 03:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ee78a236627566ebd52f3b19b5f53827 SHA-1: 7b342663acde6fb37514c4a91ed92cc7787ea211 SHA-256: d2e2e8918a58db96f302e95a77e3c65310a918b70a089947eb4ea6eae604e7b5
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF employs an image-only lure, a common tactic to trick users into interacting with embedded links. Heuristics indicate it functions as a link farm on disposable hosting, directing users to external URLs. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest it's designed to lead users to malicious websites for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=play+your+pc+games+on+android PDF link annotation
    • http://jumpstart.mobi/userfiles/file/18773678882.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/kuradunesolevetakoxed.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/80349149646.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/5250969499.pdfIn PDF document text
    • http://gazomotor.com/allinone/file/71637102143.pdfIn PDF document text
    • http://vivo-mebel.ru/upload/file/mewekolaberejomeso.pdfIn PDF document text
    • https://majubesar.net/contents/files/betaxedikerajotife.pdfIn PDF document text
    • http://www.huescalamagiaenfotos.com/userfiles/files/veboxavegere.pdfIn PDF document text
    • http://liceoadultos.juniorcollege.cl/userfiles/files/xipef.pdfIn PDF document text
    • https://plewmal-d.com/Uploads/files/38785801027.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/bezavivividalewetegivapa.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/32074088243.pdfIn PDF document text
    • http://www.workbythai.com/admin/assets/images/34783766444.pdfIn PDF document text
    • http://hai-bi.com/uploads/files/202109020817331696.pdfIn PDF document text
    • http://spakimthi.com/upload/files/rutidugesavotam.pdfIn PDF document text
    • http://aedjtjdshbf.pretty-match.com/upload/files/xenubokif.pdfIn PDF document text
    • https://brillimet.com/uploads/files/202109220306026163.pdfIn PDF document text
    • http://bivalyracing.hu/files/file/toditeliw.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/userfiles/file/zoxalas.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/givogilajowovemoxax.pdfIn PDF document text
    • http://csp.hu/editor_up/tutipudekekovo.pdfIn PDF document text
    • http://tauroconsulting.pl/userfiles/file/17174158397.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/35362787844.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/tusolesatezipudim.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/05e7bd09ce7b619fe4616766b45f8bf3/dovegu.pdfIn PDF document text
    • http://www.premiumimport.nl/ckfinder/userfiles/files/mezotuxuzogi.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_off0000b412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB412 10976 bytes
SHA-256: 2c2e933d768115f7282e2f8e2f0c76bb944f0cac2e503d1f9f4a99f812625b4a
font_01_sfnt_off0000cd56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE568 14584 bytes
SHA-256: 2d67e0da3e6dc980ceecfe7dbbc85d3cdceaad954685770ce80ad3a16950da32