Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67dda18e584bbae…

MALICIOUS

PDF

77.9 KB Created: 2021-09-26 12:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a924d14faf218ef819fc8b2637c0b705 SHA-1: 4ef64229d3ef9c6b13c90ba6d802beb0a460e796 SHA-256: f67dda18e584bbae6b5a0b39dbe8620c70835f7d160d86147d875ead3dbe500a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the 'link farm' heuristic strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=mohabbat+barsa+dena+tu+lyrics+in+english PDF link annotation
    • http://xn--h1acbpobggs.xn--p1ai/data/files/5854504104.pdfIn PDF document text
    • https://saleskerala.com/ckfinder/userfiles/files/rutejimelupavupegemupip.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16138c6ae46eef---kujutogagowolopetari.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/xoxomarowulurapadexarar.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/gebimefadizivafe.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210920165921.pdfIn PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/63911663405.pdfIn PDF document text
    • http://friulanapanini.com/images/file/40139351720.pdfIn PDF document text
    • https://kimcert.com/E/file/gituselawed.pdfIn PDF document text
    • http://tinhotsaigon.com/uploads/files/17471810975.pdfIn PDF document text
    • https://successalpha.team/upload/files/kusuzesa.pdfIn PDF document text
    • http://automyjka.pl/automyjka.pl/userfiles/file/84008725016.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/16359885455.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/wejaberosezabuterinug.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-15/20210915174955331619.pdfIn PDF document text
    • http://manu-transport.com/documents/file/vatufokokumiz.pdfIn PDF document text
    • http://ambulatorioveterinariocamali.com/userfiles/files/91095761342.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/73014889484.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/22556510706.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/81559848501.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd65072ca6---fexomulavoratasuviwi.pdfIn PDF document text
    • http://labonguyenhoang.com/img-chamthi/files/56970041216.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/77605901658.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/40451660895.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/befadijilegumoves.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202195121023877.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_off0000c4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D2 19404 bytes
SHA-256: 718eab082b6f2ab0f9508d0e6543b1c34faf1ae69599c621aef5f79c85edda28
font_01_sfnt_off0000f807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF807 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001101e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101E 10996 bytes
SHA-256: 234aaaeaab03b0357afeea23d674ba3f11d623dccca28a445dbc017ba4044ebe