Malicious PDF — malware analysis report

Static analysis result for SHA-256 6202423a1fdbc7e0…

MALICIOUS

PDF

96.3 KB Created: 2021-07-08 07:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 06de92d248654de1f9eac723d14ae8ea SHA-1: cc3bb761c2e8d6c08c654848105423165c5879f2 SHA-256: 6202423a1fdbc7e09a92d19f3e059cd906b9b721f107a5a533a2e9d2c34039bd
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a link farm pointing to numerous websites, many of which appear to be compromised WordPress installations or disposable hosting. The primary function seems to be directing users to potentially malicious content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/e1bc5c9c4a0566a6989b8bfd2ec3dd69/8891278592.pdf In PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/nekofewobanor.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/geripomisu.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/futiregasupag.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/b6c04447c6166cc1cbdc5459d47df1a2/wusaxezadalalavodaz.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160941ceb4175b---lobuzoto.pdfIn PDF document text
    • https://xaydungdonggia.com/app/webroot/files/images/pages/files/82369404352.pdfIn PDF document text
    • http://cjcounsel.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tinabegagulumutalipizalub.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/f8ik3m3vlsplkfv16e3tr5ml9d/veniwin.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/37970764577.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/melafikedexi.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/7682631489.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/ft1v5tm98ujtr3qj3c3c6ujjnp/lodirezega.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/fofojukiwax.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1f6812d623a467b5f13fe2fe11592744/suluk.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/ripifowu.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160774019b81a7---28804198916.pdfIn PDF document text
    • http://rheumatology.institute/upload/content/file/65366616808.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/6ekr6pbk0d86bpqcofs84bhtb1/vegixopamopuwigutod.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/f13410a7520136fc56c673117b4f6220/38870428928.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/44914256683ee43cf2917293559269ec/lunite.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084961ae5d46---narogupejomogi.pdfIn PDF document text
    • https://led7.ru/file/kiwijuxo.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609362a1754a4---80916460546.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=daddy+long+legs+fred+astairePDF 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_off00011735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11735 10644 bytes
SHA-256: 0e5697a422c0c0f1746c76607db4d3f41981c2d97fd5deb461607b7c4f8e33bf
font_01_sfnt_off00012f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7E 17116 bytes
SHA-256: 86072dbd58885e4f1c6867bf51111a0f5725507d6f49cf559ba9c63205d83c15
font_02_sfnt_off00015bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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