Malicious PDF — malware analysis report

Static analysis result for SHA-256 35ae2b19a8f9d8c0…

MALICIOUS

PDF

78.0 KB Created: 2021-06-10 22:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: ffb3dc2c52cdd51208b042dcf6034dfa SHA-1: 03393cc30aedbe8a24a4c1e4d242a8ca41b839e7 SHA-256: 35ae2b19a8f9d8c0fc54d0e8cbca9e9d485350e3122fe313369232cc3e0def9f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a deceptive title and numerous embedded links pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the presence of many external links and the nature of the heuristics indicate a high likelihood of malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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 https://irlanc.ru/uplcv?utm_term=mainu+tu+leja+kite+door+ringtone PDF link annotation
    • http://cestovni-postylka.eu/userfiles/file/98541219228.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/91508c3f5a9ff8df153109cfd2dd1c00/nowomokus.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/62227078580.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/dd985a435712de584e2c8731d3cdde90/35685222651.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/adco2a48gn76nmfdep2poqrnnu/jisimuluzuxujokuwelevas.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/35547134281.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16076f8a99c8a6---xudejozaxewux.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a2f52b85b---vufavelipatebuf.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160915870a6853---13667619675.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/3b30r0t5q32mnqqbpk0oekbjef/26494210020.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/acc3fea37ae80f33fd04fa1eeb1ad343/46838060929.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16078e840b485b---woragaberovi.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/jezamenobudelokolezugemuf.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607031b851428---39015553667.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/f73738c4a27b9e0c911e9cd1a506bbbd/bikat.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d315918c10---83589562119.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E7 4960 bytes
SHA-256: 60f48ece6ae356721dc4c520a3b927113e7051e8badb18348d9a85d99caddb70
font_01_sfnt_off0000e1dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DC 2540 bytes
SHA-256: e27465a019eb113d8228011e6b9ead4c8b7a0561a56dd2e332701d0a94a08e67
font_02_sfnt_off0000ecd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD5 11092 bytes
SHA-256: d3dc5df155819d4b0fb862a3032dd8caa4b04fe389a4fc4b7fb300e451f77d44
font_03_sfnt_off000112d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D9 16372 bytes
SHA-256: 720924f8e47bc6e29a5c8f38cb70eec38ed4011b4bcc0dd338f8551a92c3c76b

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