Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6fd950680365c5…

MALICIOUS

PDF

86.3 KB Created: 2021-06-28 10:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4c9cc8e290cdfd7c6f67f04862323c36 SHA-1: e8219d7cb35b1299d665f9400c544cf1d03fd9ae SHA-256: fe6fd950680365c5dc7128c14cddc0410983342131c318b91f03942e04abfc6f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 https://archism.ru/uplcv?utm_term=can+you+be+a+notary+in+multiple+states
    • http://domholidays.com/userfiles/file/91191531045.pdf
    • https://umartravel.com/files/misubilirerekelajulili.pdf
    • http://beijingxinzhi.com/userfiles/file/20210519054556_878494881.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/fa721899f2cdac1b911b9ce1176d9988/gapopuparator.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/fcce5b194129737f6a9910b215650614/96895953465.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a05936cfef---xozilijopoguwela.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e1d21150e---63648264497.pdf
    • http://getampedmag.com/ckfinder/userfiles/files/vakibutapaxuloduzew.pdf
    • http://arohitourandtravels.com/userfiles/file/gesebifad.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af3c9098f11---88970851758.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/7497dbf612da26358e174b237c0e9407/lijofopobojuwozi.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/aa7d5e3f49584d426c63572d1a914704/pazagumagekoxi.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/15edfae30f718d3bbc0c3747f9b9fad8/45747332188.pdf
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/bec5d4697cc910226be963d0d3836639/29679698245.pdf
    • https://europartner2.pl/uploads/jemidivujufotalifibanad.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608760123f588---patuwe.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/ba7a6bdc7b6790ec666dfcaf215203c1/39256305760.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/92a471f9388e5b013e4c9e26475c1b15/46998504434.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/1abfe3a7f6169d980c489a900611e048/62195445816.pdf
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/76020765031a228fe629c2afa995c506/guwijojegegovud.pdf
    • https://ntpuvoice.com/ckfinder/userfiles/files/komul.pdf
    • http://www.aadhar-interior.com/userfiles/file/pesosotozabukoninamuke.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/fac646e3fb6e56a1672f6fda895f3c43/pujafelejine.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/leneramoponaxused.pdf
    • http://j-line.ca/fck_upload/file/41608367862.pdf
    • http://logo4you.dk/userfiles/file/79676072209.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef77.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF77 16792 bytes
font_01_sfnt_off0001078e.bin
f4f9bbed20a6be65b5e1484eff23e6e0af9655418476c518d95a1065de92b78a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1078E 10796 bytes
font_02_sfnt_off00012038.bin
dcec183f439bcf118fe5ba48997f4f5fc54bb672139cf953347163a1621730d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x12038 16676 bytes