Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda782ffff123005…

MALICIOUS

PDF

73.7 KB Created: 2021-09-21 13:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e04873b4e44bc337a64d727d7922fe07 SHA-1: 3601957939c5b500a4559a62fc816a5d2a0fa405 SHA-256: eda782ffff1230058777e8cdfa80b2d0da3551580f39d2cec48e1ce2f0727d4e
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_CALLBACK_LURE' strongly suggests a callback phishing or tech-support scam, where the user is prompted to call a number. The presence of numerous external URIs, many hosted on disposable domains, further supports a phishing or malicious content distribution scheme. No scripts were extracted, but the PDF structure itself is designed to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://allytemp.ru/uplcv?utm_term=video+star+para+android+uptodown PDF link annotation
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/75899184594.pdfIn PDF document text
    • http://tns-china.cn/editor_upload_image/file/95487896285.pdfIn PDF document text
    • https://realxenon.ru/uploads/files/kobaxalazunodel.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/36037139233.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/zuwipakaruga.pdfIn PDF document text
    • https://parkettworld.com/upload/files/naditiwitimod.pdfIn PDF document text
    • http://grafosaleservice.cz/images/fck_editor/file/66249791985.pdfIn PDF document text
    • http://855solution.com/htdocs/cljr/data/files/22352057539.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/wesevenewivisodiru.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/ratusuxebirivuw.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/ferosatavefabizu.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/88403848424.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/eaththn2si13rnsb63uf9d1eb3/jawadonuxexewaxubodalo.pdfIn PDF document text
    • http://thaifilmind.com/UserFiles/file/42125465817.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/69528828755.pdfIn PDF document text
    • http://chanhungcorp.com/images/uploads/files/nokifoz.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/72894820368.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/20811559473.pdfIn PDF document text
    • https://futurefacesmiami.com/uploads/file/komem.pdfIn PDF document text
    • http://agrion.org/upload/fichier/1952885426.pdfIn PDF document text
    • https://lrsdev.com/userfiles/file/90777604563.pdfIn PDF document text
    • http://carrozzeriardue.it/userfiles/files/35118170830.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/62279055942.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_off0000bf37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74E 10492 bytes
SHA-256: 6edf417b588d1bf5afd1f950d7654aa7c8377ef8f8c4f9ceb0f8a442a93bad24
font_02_sfnt_off0000ef54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF54 16464 bytes
SHA-256: 0d07f3bf9ecdf76282f57feb77487999d75abe066ffebc23a3fee08e5b9968ac