Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0b4b35aa81f016…

MALICIOUS

PDF

84.4 KB Created: 2021-07-18 00:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 45e969a396f9bb0b927e30415deb76b0 SHA-1: 92255839179c60a2aeb65e774573777079499c20 SHA-256: 0d0b4b35aa81f01670ea1f25256a2832f3d209e6c2cdb219e0c6875161fd0296
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites and disposable hosting, 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 URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6a6a73c3b---zeniginisefel.pdf
    • https://icbacademy.com/upload/files/bijosiwirejefitegalave.pdf
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/c51226cv4u88jlfosuu7gq64sn/67340059821.pdf
    • http://supermarketdv.ru/files/file/revuvifipawupaveviget.pdf
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/73225845656.pdf
    • http://alimentosldm.com/userfiles/file/90997584442.pdf
    • http://webbuilders.com/files/file/matexanumunuwusugefefesi.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc51142199---89243452003.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c963e7f051---48477986484.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/8ba74c75d6e556b41a318cfef6383cc1/69343698721.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849debc029e---lerobofepetevajowijipevoj.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b63399e219c---80662311428.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095eda260458---tometiwapimemonegoj.pdf
    • https://dianthusindustrial.com/resimler/files/lupajisipapowifu.pdf
    • http://accessprecision.com/userfiles/file/xexavame.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/6ddb721e3a29343c714e8ca72e40d301/72063508307.pdf
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/3ed1c211481747b4840c86d63fa7dc1f/jokojivenalujos.pdf
    • http://mosvag.ru/img/lib/file/bibelovifunazo.pdf
    • https://yingzhaoliuart.com/upload/file/xawewavunegirifo.pdf
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/2a2fd2bb09e86063c8a6b8dca1633e12/43091347560.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16089867d31ad4---27350854997.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609775416428f---vutoba.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=baby+at+6+weeks+old+in+womb
    • 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_off0000e635.bin
07f073232fa16731e04d9494e6af2f3307bd28da237a81eb0d8bee280d4dbccc
pdf-font-stream PDF embedded font (sfnt) at offset 0xE635 10964 bytes
font_01_sfnt_off0000ffc5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC5 16792 bytes
font_02_sfnt_off000117d7.bin
964a25a88c64fd5e67bf210c2bc7cbd2bce4941c7e2cdcd570e36a45e213e158
pdf-font-stream PDF embedded font (sfnt) at offset 0x117D7 16672 bytes