Malicious PDF — malware analysis report

Static analysis result for SHA-256 48655222637980f4…

MALICIOUS

PDF

84.6 KB Created: 2021-08-21 05:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 004223d7fbab5d59f8feefa85207ae01 SHA-1: 9ebce712c39b79b400a4d3e50492a92a3dbf107e SHA-256: 48655222637980f48b0afa18a5f2a6b1080985e8ca8b489ad9f32234de31ec8d
156 Risk Score

Malware Insights

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

The 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, directing users to multiple disposable hosting domains, some of which are compromised CMS uploads. The presence of numerous unknown URLs suggests an attempt to redirect users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://ecompletecontact.com/ckfinder/userfiles/files/larisufox.pdf In PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/7459804327.pdfIn PDF document text
    • https://scapetime.net/images/website/user/files/gejidirajazawogej.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/vuvotiviwonobufofegoku.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/jalurawazegizilaf.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e38fa4d26a---dunilujop.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c1dc34f81---zawilimuvasatukizax.pdfIn PDF document text
    • http://e-photo.lv/ckfinder/userfiles/files/37365078256.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/migamowovasekinej.pdfIn PDF document text
    • https://clinicscrm.com/img/files/monijijijuwipopalor.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/pitanodavekuzogumu.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/kasisadabiledu.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/zetegovojisipug.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ed5121ad7---vatugubujixujak.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffc45dfb33---zenirozilebupuzekinu.pdfIn PDF document text
    • http://www.heksan.com.pl/file/11319816274.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/142oiv6gnnkqhdki6bsk4k3f8q/mitopiluz.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/7828fdd8f31df50114ce42e0c7100605/lerinuxawojosadulopav.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4950800dd3---58594713919.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/jatofedifuronetubenilosad.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e53acf5a7fb---tejinotamixil.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/8r81v5kbqu8bt05mu5nr2p0t44/botapevogajibaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=who+viewed+my+instagram+profile+applePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1F 18240 bytes
SHA-256: 64e760fb299935361f2a3778b4a4f5aaeacb1c0d5d92d55f2bfab01ccb4ef55c
font_02_sfnt_off00012ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB4 11204 bytes
SHA-256: ad63c6de5e4c36fb8f74b3390f7ae34f0befb0ad572c3afea05bae0429e93cb8

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