Malicious PDF — malware analysis report

Static analysis result for SHA-256 703e0ee9726b5c9d…

MALICIOUS

PDF

94.2 KB Created: 2021-09-16 22:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b6eee637891dafb0eb3fcd5837818dbb SHA-1: bfedf9f5ddac39a39b2021598ac4f6556d686021 SHA-256: 703e0ee9726b5c9da6f2b3dcb04736b34bae6bc370428093b2572e633614ae31
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised websites or disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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 http://meruzhankhachatryan.com/app/webroot/files/file/roxemixeralodesukuvopame.pdf In PDF document text
    • http://df-2.de/images/daten/file/wazojapewasawut.pdfIn PDF document text
    • http://etcpremium.com/userfiles/files/14481114569.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/30684522516.pdfIn PDF document text
    • http://kocavietnam.com/upload/files/49904172375.pdfIn PDF document text
    • https://jensbrode.de/files/file/magofepelitilixekewezar.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/01f03a632a7b1660fffdf070e5f2b77b/vegukuwidixolalenogugikex.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136bf5ec8d37---wumamedevufiderajiwe.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5e4d57bba---karedumumexevafaxiz.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16137281472bbc---labikizifubaguzebax.pdfIn PDF document text
    • https://pro-biomed.com/admin/userfiles/file/34074217292.pdfIn PDF document text
    • https://vaynhanh365.net/contents/files/kafapobejituju.pdfIn PDF document text
    • http://staceyasp.com/UserFiles/file/norofujomusaw.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16133f84f24426---37436835882.pdfIn PDF document text
    • http://annassteen.com/ckfinder/userfiles/files/dudepufuletopugalirini.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/92608152952.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b972c81a5a---85984292752.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/74767330698.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/d5bdc26ce220bd0abba748e9f9bc11ae/64157826207.pdfIn PDF document text
    • http://machin.kr/userData/board/file/84801311351.pdfIn PDF document text
    • https://trinityautorepairs.com/uploads/files/tebel.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/91262991436.pdfIn PDF document text
    • http://yourmoneyyourbank.com/uploads/File/54854063050.pdfIn PDF document text
    • http://sm.ac.th/ckfinder/userfiles/files/7178503912.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=8+letter+word+starting+with+laPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01F 16124 bytes
SHA-256: 06ffa8173eb588fec3a05e94d055eacf65c096f246e92b39997b834d7475e4dc
font_01_sfnt_off0001057d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057D 20688 bytes
SHA-256: a3b54712100dacd0cf723d9459bc967c49df2fd9fc06a5e4df3ea2adab2cf678
font_02_sfnt_off000139f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001520e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1520E 10724 bytes
SHA-256: b8274fdc4acc6832dedf4769c8e3bf764ab82794c135a9e6285ebd70156f5f93

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