Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e439cd62641db4d…

MALICIOUS

PDF

80.6 KB Created: 2021-09-18 06:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6cab792ab93dfba16537ed87a4250a3b SHA-1: b89c28f11419382a6bea4a22a3fc4727f3df8018 SHA-256: 6e439cd62641db4dd3f484deeee38f23165ab065f0f96bd9c7b055e7a012c5fe
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including one with a 'utm_term' parameter suggesting a phishing lure for 'restore deleted contacts android', points towards a phishing or malware distribution campaign. The PDF structure itself is identified as a link farm on disposable hosting, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • 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.
  • 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://coretry.ru/uplcv?utm_term=ripristinare+contatti+cancellati+android PDF link annotation
    • http://only-svet.ru/upload/files/jutebilesafilijigina.pdfIn PDF document text
    • http://dalieuht.com/app/webroot/uploads/files/5411531775.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136672b1cf62---nupevulazuderoguvabev.pdfIn PDF document text
    • http://japhina.com/upload/file/zesopa.pdfIn PDF document text
    • http://halongwave.com/userfiles/file/43486301505.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/bapevetagapiboverivenajes.pdfIn PDF document text
    • https://dennismaloney.ca/upload/editor/file/32512323917.pdfIn PDF document text
    • http://oa30us.com/userfiles/file/19904767829.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1aab0f808---gureroganinujis.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/1167843598.pdfIn PDF document text
    • http://i-akparat.kz/ckfinder/userfiles/files/62182619710.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/derulituke.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/rapas.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/95506258775.pdfIn PDF document text
    • https://faguaflowers.com/images/admin/file/17438595632.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/dojezolalegifekafofa.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/lomevewinoximafenixeta.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/52319804050.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/43265391498.pdfIn PDF document text
    • http://www.rajpuc.pl/pics/file/77935778431.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/wavunojodipo.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/24064751486.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_off0000d4ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EA 10552 bytes
SHA-256: d551aebfb8e4b831593c0c972e6c831eb2b67d5426541d941dcb24e23c12a9aa
font_01_sfnt_off0000ed0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0B 17572 bytes
SHA-256: 6b016997972197ceec40d45c09c5827db506c6d71188bd994eb79141379143c4
font_02_sfnt_off00011b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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