Malicious PDF — malware analysis report

Static analysis result for SHA-256 69ea17a3625d840a…

MALICIOUS

PDF

82.8 KB Created: 2021-09-16 03:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 32134c89932dc087d78575c2282a1018 SHA-1: 4d8202702ee459ca53ef6d5a4d3af942e74d65a8 SHA-256: 69ea17a3625d840ae5889dfd4f9dbad75703330f931acf7d1f8482d90aa744ee
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Static analysis reveals it functions as a link farm, containing numerous URLs pointing to PDF files hosted on various domains, some of which are associated with compromised CMS uploads. This suggests an attempt to lure users to download further malicious content or engage in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://tootingtaxi.com/survey/userfiles/files/zureniwanibi.pdf In PDF document text
    • http://onlinevay.com/upload/files/91979883979.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3dcd78c1b---68191130189.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/85042238035.pdfIn PDF document text
    • http://industrialdevices.in/uploads/98980100075.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/kotewuzosabima.pdfIn PDF document text
    • http://eatoceanic.iorderfoods.com/uploads/files/64567768139.pdfIn PDF document text
    • https://matraci.info/UserFiles/File/ruxevagiv.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/5294944cf8023565d301a868c175a169/1050691890.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/161387a85625fc---mijorupivelo.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/36107439570.pdfIn PDF document text
    • http://gachbinhduong.com/upload/file/refejuwo.pdfIn PDF document text
    • http://aal.tw/uploads/htmlupload/files/7923602277.pdfIn PDF document text
    • http://pp-aqua.com/userfiles/files/81478310291.pdfIn PDF document text
    • http://kortennis.co.kr/B/ck/ckfinder/userfiles/files/35858881409.pdfIn PDF document text
    • http://ngoinvest.com/uploads/ckfinder/files/badepijuja.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/161366d3e5f33f---81086256249.pdfIn PDF document text
    • http://rainternacional.com/userfiles/file/39926100634.pdfIn PDF document text
    • https://beautifulhairstore.com/upload/files/9276023077.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/figurexujatiniku.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/zizerazemusapojiso.pdfIn PDF document text
    • http://e-sheremet.com/img/xokigovowopelaf.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/sovubesulug.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/71c1a59fce0104e5d7f9af770d90d155/kemuvipojetedif.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/fixelivotag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=30+rojullo+preminchadam+ela+online+watchPDF 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_off0000dd66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f57d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57D 11124 bytes
SHA-256: 36feed9309e25c004ea6a6c6f99b7e569b8b1255b70a4a4150915e18cab9b14c
font_02_sfnt_off00010f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F31 17844 bytes
SHA-256: a1d869933e33f97a70f601f381352f1eb2bcb800f15825886219c3040036588d