Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d0f0247dabc14f…

MALICIOUS

PDF

81.6 KB Created: 2021-09-06 18:20:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 55ca7eb3a623df861508dd7cbcf8d574 SHA-1: 695a4a2ef9c92691b6fd955e2eeb99daa242c723 SHA-256: d1d0f0247dabc14f8935b39a59a16f846fbaf5d1b9522d9e92276df3ae9a8768
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to various domains, many of which appear to be compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://medvor.ru/uplcv?utm_term=importance+of+communication+in+agricultural+extension+pdf PDF link annotation
    • https://terminal.hr/userfiles/file/dosufegikujupuse.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160dd9e232f8f6---99869822511.pdfIn PDF document text
    • https://chulintemple.org/CKEdit/upload/files/47198991149.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/49310760537.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608060788d66d---zuvosusatawowe.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/8f7955590d7369025aefd2948287d225/wogose.pdfIn PDF document text
    • https://esz.jp/img/editor/files/rajazavebena.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/942c65bb0f965b26c1649eaa950cdbc7/xipuxuruvuxovuxa.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/42423158612.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b718ab629e---64573518204.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/varajebewovemafa.pdfIn PDF document text
    • https://777mto.org/contents//files/98447348279.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/51845354261.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/21d53324d72a3942b905f56040155c8c/nifamupifubaz.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/74606458549.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/zugul.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/45fd91966fc834d2aaf991ee4d06a680/tagojamomuxenakegeza.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/77683812148.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/mefupisawo.pdfIn PDF document text
    • http://gabident.pl/local/userfiles/file/vufevekerifotojuxowewef.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/regawiforoweworevilijol.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845fa077f7e---45078266255.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/3559274247.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/60f873f9f647348340d8cb81d08cdaba/56325816383.pdfIn PDF document text
    • 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_off0000d9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B3 16980 bytes
SHA-256: aabd814afe3a211a0c4ced201400881b5edd628e7268c9d5ca1ae94db273a02b
font_01_sfnt_off00010647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10647 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5E 11116 bytes
SHA-256: cc09d02b0f264d850a6856652b257abbdf57b78c9ec44b4240ffacb25df6d02f

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