Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec6dc48ede9f336…

MALICIOUS

PDF

77.7 KB Created: 2021-09-06 01:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4eb53586bf076105c9c867515939f854 SHA-1: 5fa64b82949d5227fb73161e9c23c2daafadf78a SHA-256: fec6dc48ede9f336de703861eb2e601e1c96b74b1f87467312658c9d37850fcb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to various domains, some of which appear to be hosted on compromised CMS upload storage or disposable hosting. The primary purpose seems to be directing users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://frchem.cn/upload/files/8172457325.pdf In PDF document text
    • http://goksirlambinowice.pl/img/upload/files/36348633499.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/tavozelitif.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc20e8c44f---62362753397.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/wororedok.pdfIn PDF document text
    • https://gonguyenkhoi.vn/upload/files/41015581076.pdfIn PDF document text
    • https://estoniapools.com/contents//files/mivisuguragatekofukotibif.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609a557babe8c---97291030163.pdfIn PDF document text
    • https://berettyotv.hu/userfiles/files/nugexiz.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/sasugurujukijezovugo.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160828340dcca4---79554960660.pdfIn PDF document text
    • https://universitecentrale.net/uploads/FCK_files/file/tobamex.pdfIn PDF document text
    • http://www.abcklima.hu/data/editorfile/75161173666.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d82fbd324b---witegopigoputosexe.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210529182207_d0j97f.pdfIn PDF document text
    • http://www.neoneofitou.com/ckfinder/userfiles/files/4647656559.pdfIn PDF document text
    • http://alwaysshine.com/fileimage/file/linikikomibolejeresi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b20c6c0e0c---goritisibu.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/sugexise.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/liputo.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/49532072878.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/fedetutopozarofo.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/92bc5e3fa0caf2741ddaa46c3717d724/gimarufajobudumugabige.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a099d29f28b---rugurokuro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=manual+plmn+selectionPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF8 10528 bytes
SHA-256: 002e60be89b219556cf3cc06b001fe813308961f21811e1a6072bae244156d46
font_01_sfnt_off0000e3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3ED 17516 bytes
SHA-256: 5c2953db4e109b85b5f72373cfc277e7d9b2af6f2c2635487e017ccdd151a118
font_02_sfnt_off0001113b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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