Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2252a5a28d573e7…

MALICIOUS

PDF

87.0 KB Created: 2021-09-01 16:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7db1e4c65b511518d82c7b1359a8fb59 SHA-1: acef726a838a5a26edc601608652a154b14a33bc SHA-256: d2252a5a28d573e77edcbc623629add63a1a1c7db61feacec5c78c879b96302e
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to external websites hosted on compromised CMS platforms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://mistral-paints.cz/userfiles/files/20623540298.pdf In PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/83476742300.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/96ae273752e85ad934ff805574ce4e7f/64780724010.pdfIn PDF document text
    • http://roocenter.ru/upload/file/pesipojezudima.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867b280f19a---24311674326.pdfIn PDF document text
    • http://monroehighbeachreunion.com/clients/8/88/88bd109b8fc96949fe6caf7698e88fda/File/37713351991.pdfIn PDF document text
    • http://alexdisinfestazioni.com/userfiles/files/87844870222.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/wusivapikidiwuwilapeborir.pdfIn PDF document text
    • https://edinburghpools.com/contents//files/tevuponuzegipam.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/2ncsmrhvjisgngs7ol80tin3om/73969575782.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/begatafifomob.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089604b9e12b---wifefawubilibekab.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3d36f9ecded953d7ad0a23531aeee9b2/62186893385.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085c37588081---bokuzosapuvemazobadefomo.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/jmmqth2876u46qo59d68mjm096/52954729303.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/dibatu.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/beduradakuli.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/1332573d5d25c4fb9eec55270c353c33/vizamab.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ceb5d0ed52---wegezaw.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/34143648475.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948f7fe0ce2---kepiwodarerewovij.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/derofubebokujifosusabim.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bef9a700274---14733017276.pdfIn PDF document text
    • http://greathorserider.com/ckfinder/userfiles/files/lemani.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16126d5cbe713c---85515882486.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=the+first+sultan+of+the+bahmani+kingdomPDF 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_off0000e6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CB 20204 bytes
SHA-256: 16e6b146d692afc573d914ddd772a3251c2b5be7be649164a7db01ee342c4622
font_01_sfnt_off00011cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBE 11096 bytes
SHA-256: ffeb80eea3172e1ab36f1f3477678620efb43c7333ce25f34f0fcc88bd0afb7c
font_02_sfnt_off00013637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13637 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1