Malicious PDF — malware analysis report

Static analysis result for SHA-256 560a6329da937803…

MALICIOUS

PDF

72.1 KB Created: 2021-10-05 15:08:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 15d71f92f64fd6a7c57892647c5f67a1 SHA-1: 48ccaa77ec11e810e7a174554e8d0f5d716e9223 SHA-256: 560a6329da93780346271ed6518433114470a9d06a058ad4ade552efd57c3f9f
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous external URIs, with several pointing to compromised CMS upload directories or disposable hosting. The embedded URLs suggest a phishing or malware distribution scheme, likely intended to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://allytemp.ru/uplcv?utm_term=web+pages+in+dark+mode PDF link annotation
    • https://gogreenonline.net/userfiles/image/fckeditor/file/44740101027.pdfIn PDF document text
    • https://holcom-wd.com/webroot/img/files/86996156990.pdfIn PDF document text
    • http://hotelbasantresidency.com/uploads/51833726929.pdfIn PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/fevono.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f219663f88---terusiwewunoluk.pdfIn PDF document text
    • https://online-wums.com/files/files/58603909854.pdfIn PDF document text
    • http://www.tempshift.com/app/webroot/files/uploadimagesfile/77596854021.pdfIn PDF document text
    • http://nova-auto.com/upload/18622749636.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615abf7c9ec05---dedeluwulumegomuk.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/videdav.pdfIn PDF document text
    • https://deshpanday.com/ckfinder/userfiles/files/zezajerenuvux.pdfIn PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/17099488864.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/loguporijakugazuravitiwi.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/15920050032.pdfIn PDF document text
    • https://khmernative-rice.com/userfiles/file/jolofowupirivedadefutaxak.pdfIn PDF document text
    • http://coolbiotech.com/upload/files/tebixas.pdfIn PDF document text
    • http://iburgisidimarsala.eu/userfiles/files/40098168773.pdfIn PDF document text
    • http://ruizhishengwu.com/uploadfiles/file/290700547511.pdfIn PDF document text
    • https://pestresolution.pt/site/upload/file/fuxoxife.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/buluvipidenorikeku.pdfIn PDF document text
    • https://emenu.hu/editor_up/14240005179.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/63979065222.pdfIn PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/88764198321.pdfIn PDF document text
    • https://derya.afmiletisimajansi.info/resimler/files/rodebegi.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/848d47b1d36a82b86fae329c9223dd51/vipidilexipokiriwepa.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_off0000b753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB753 16672 bytes
SHA-256: 57fe57c6c2153b4644a11ad9b55647442e8a01d0afe42549eb0d0335cd25947c
font_01_sfnt_off0000e255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE255 10816 bytes
SHA-256: 0c1de85031cdbf2387c5b88a11ee517a5a7aece0bd2a5a93522f3a7674679f1d
font_02_sfnt_off0000fad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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