Malicious PDF — malware analysis report

Static analysis result for SHA-256 4247079229df724a…

MALICIOUS

PDF

82.2 KB Created: 2021-09-11 02:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ca2985fb8918814a653948e7be21cc8e SHA-1: 17ce70160d29ceeeff4d21b0aea9f1c7f8639946 SHA-256: 4247079229df724a5329a22df4a9dcb18b729784957207aa3ecf9a45d0f0ce35
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 a large number of embedded URLs, many of which point to disposable domains and appear to be part of a link farm designed to redirect users. The presence of these links suggests an attempt to direct users to malicious or unwanted content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://mibenjamin.com/userfiles/file/8658363340.pdf In PDF document text
    • http://timecraftz.com/userfiles/file/pases.pdfIn PDF document text
    • https://aldwalia.com/userfiles/files/26899916382.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/sojogokokasitumej.pdfIn PDF document text
    • http://joinsocialbubble.com/cake/beta/userfiles/file/wotowu.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/90726136135.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/pabaxinomameta.pdfIn PDF document text
    • http://psychologadamczak.pl/userfiles/file/80086490016.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210904162504.pdfIn PDF document text
    • https://cordovajewelry.com/images/file/95846924526.pdfIn PDF document text
    • http://antonellascarpittadesigner.it/userfiles/files/fibamiladuvugifafaj.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/61386c4fc78d8.pdfIn PDF document text
    • http://hrudolf.com/userfiles/79698671886.pdfIn PDF document text
    • https://zilalcooling.com/other_files/File/42910130894.pdfIn PDF document text
    • https://we-plus.tw/ckfinder/userfiles/files/46898825575.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/78015556397.pdfIn PDF document text
    • http://aatmicscience.org/asuserfiles/file/nomilofo.pdfIn PDF document text
    • https://pixel.bg/img/file/96910125750.pdfIn PDF document text
    • http://tccsrl.org/userfiles/files/bonari.pdfIn PDF document text
    • http://alpinist.store/sribati/editor/uploadfiles/66673602490.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136e383a63e6---82419453365.pdfIn PDF document text
    • https://sbmhavacilik.com/userfiles/file/22310089375.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/riwilar.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/fowevesadanumoxa.pdfIn PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/nevun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=real+racing+3+mod+downloadPDF 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_off0000dac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC4 10752 bytes
SHA-256: 508c1274c0b9849d26437bad04cbd83a81cfbab82871c0666667887300bd3108
font_01_sfnt_off0000f345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF345 18356 bytes
SHA-256: 243b44fea6c6c74906e328b8b41ad7f9ef7bde25e4aa56573f2c1e19d77243ce
font_02_sfnt_off000122e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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