Malicious PDF — malware analysis report

Static analysis result for SHA-256 393c842160e37e99…

MALICIOUS

PDF

86.3 KB Created: 2021-06-27 08:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fd1f519168c475bd6996d49adff653ae SHA-1: 4e207f72f7987ad2d177e8a83167f70b3561fed4 SHA-256: 393c842160e37e995d75d0f56ccf2d838beb8b5666c673865029f05826adc4e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised WordPress installations. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://garglob.ru/uplcv?utm_term=native+american+pictographs+printable PDF link annotation
    • http://astro2sphere.com/admin/images/file/88803279401.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/57798170829.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/a471f9bb0dcea845c3087045c5cc7e2a/welukedozagiderodozodijir.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/45231998518.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/9176441475.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/6tpldrj325a6oipuchdcmn7ha2/fuwom.pdfIn PDF document text
    • http://delshadian.com/public/userfiles/file/5470264240.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdf294bcb2---82233909441.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/5fc28a869d4aa5b1173e60a7524f3990/40115038623.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/7323109768.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202106111227011907.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/pun9uotf353rp0crg5svvskrg6/27510478193.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/47362972468.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/dopkuhskl711vssk55p3jlu92n/77871018259.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/59517463940.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/nusixeti.pdfIn PDF document text
    • http://ausafe.net/images/art/files/nejixewej.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210507130515.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/91337698887.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3e4618005---moniromazijaga.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/76879466107.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_off0000ef9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9A 16720 bytes
SHA-256: a6e12f7d2d8bfc5a4bebf00e5b415249525182f980106220b33918fe4ec900b4
font_01_sfnt_off00011b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0D 11004 bytes
SHA-256: a0448c0f0b1329b34731777ed28e9ed58ef503ff4f8856d1e01e791a33ffbc09
font_02_sfnt_off00013436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13436 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1