Malicious PDF — malware analysis report

Static analysis result for SHA-256 e62107117d020bb4…

MALICIOUS

PDF

81.1 KB Created: 2021-09-12 23:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 492a7fd0b9bf41ba3b5e6a497d0f20ba SHA-1: e8c0539e89e3ab313acfe546565e87668b4de774 SHA-256: e62107117d020bb496e1702049fed7231aa3dd4b6969210808eb41f604f9c4ab
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm. The presence of numerous unknown URLs suggests a phishing or malware distribution attempt. The `PDF_SEO_DISPOSABLE_LINK_FARM` heuristic specifically points to a large number of links on disposable hosting, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://burlingame.com/wysiwygfiles/file/lobamopijobaxipera.pdf In PDF document text
    • http://ipceurope.eu/assets/file/37108105904.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/datokelizewuzedaxok.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/jobumukawepudekevifozukej.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/bikajeduzifox.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/gilujozivavolezotosutiva.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/roduvebod.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c02b3a71dc---loturadusedeli.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/8239062854.pdfIn PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/dodanidetusug.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/nebegagatakugujo.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/75598680191.pdfIn PDF document text
    • http://fitviewer.biz/files/file/doxijeloxegigega.pdfIn PDF document text
    • http://hainfelderteich.at/wegapafif.pdfIn PDF document text
    • http://mfahk.com/upload/files/wujofuvotefoj.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/183a517b7a24f92b96e57657b5eb8522/titilozatuxunidezulugajas.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/bepugadomupatit.pdfIn PDF document text
    • https://robodom.si/files_vsebine/78471286016.pdfIn PDF document text
    • http://stmarysharipad.com/userfiles/file/47637078617.pdfIn PDF document text
    • http://nawoo.net/userData/board/file/69183524482.pdfIn PDF document text
    • http://paliukenas.lt/i/File/kugevalag.pdfIn PDF document text
    • https://noursportevents.com/wheelmarine/userfiles/file/luwivijixakudaki.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/80516172021.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-9-8/20210908000241635052.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=outlook+sign+in+free+personal+emailPDF link annotation
    • 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_off0000d7f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F7 17564 bytes
SHA-256: da46cb4acf25c4c29b254af7b90bda56481998d73e7901966220d849fc2d71bd
font_01_sfnt_off00010506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10506 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1D 10920 bytes
SHA-256: c0119ec1192de9df180e78759c495d40b358507b0c13aae99955c80636035f30

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