Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa5bfe85ed32a6c…

MALICIOUS

PDF

81.6 KB Created: 2021-09-17 05:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b96ebbaebb7a3650cdc930f7b89a90ac SHA-1: 578019a26bb1c1eb0633db077f9e212521dea3b4 SHA-256: 6aa5bfe85ed32a6c23322095f41a6c66b8f2e763f1cb024c82fa82058bbbed1b
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to disposable hosting, and is described as a link farm. The heuristic 'SE_QR_LURE' suggests the document may instruct users to scan a QR code, a common tactic in phishing campaigns. While no scripts were explicitly extracted, the presence of external URIs and the link farm nature strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://garglob.ru/uplcv?utm_term=qr+code+spriggan+requiem PDF link annotation
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/rikodutosejuvop.pdfIn PDF document text
    • https://griby.biz/ckfinder/userfiles/files/17171509174.pdfIn PDF document text
    • http://thebodyclubonline.com/userfiles/file/xefavopebalovufumemewi.pdfIn PDF document text
    • http://energy-labels.nl/userfiles/file/46896552495.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/6722618204.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/pekok.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/681b4e6737f532c8a3b88f57b1c20905/8403863984.pdfIn PDF document text
    • http://baozhaopharma.com/upload/files/vogutabenesefasi.pdfIn PDF document text
    • https://wupaojichangjia.com/d/files/38092017675.pdfIn PDF document text
    • http://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xoribetazikasewewero.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/40350507639.pdfIn PDF document text
    • http://rayanchem.com/d/files/fijagalobuxapaxovore.pdfIn PDF document text
    • http://cheumst.com/upload/fckeditor/file/batot.pdfIn PDF document text
    • http://olguanaokulu.com/upload/file/72425373597.pdfIn PDF document text
    • https://oolong-dining-co.com/webroot/editor-uploads/files/felibipirexupa.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/dolefikoredapaberemuzif.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/c9vh11slamjqqlfri9ihclcp8b/xeturojebagaz.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/tumizadewagejibudawub.pdfIn PDF document text
    • https://automatisme-portail-bordazzi.fr/userfiles/fichiers/34169473481.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/duwotemoxali.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/56148841006.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/46271630769.pdfIn PDF document text
    • http://thegioimercedes.com/upload/files/951145342.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/98221998831.pdfIn PDF document text
    • https://www.borzabadi.com/ckfinder/userfiles/files/10334869436.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_off0000d8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FE 17652 bytes
SHA-256: 2fe46758baa9205b8614847eb5dc0a5c0143f14f35f76e9b3d1d073dee97e409
font_02_sfnt_off00011f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3A 11016 bytes
SHA-256: a03c8e28ad3b55045f16672a1d9fb3f4c50e6863448838fc34019047ddc84b4e