Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec69ef5a41fcec9…

MALICIOUS

PDF

81.0 KB Created: 2021-09-05 01:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c42bce6b00301c23cae1fdf454521f88 SHA-1: 75f1be5bc21cc6cf6a6b47a3cdc68331fcdb74b2 SHA-256: cec69ef5a41fcec9194be764dddbc167adcdb290fd2c3067976fa455a2a4dd5a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external URIs and links to compromised CMS upload storage, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure indicate an attempt to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://philabc.ru/uplcv?utm_term=comparatives+and+superlatives+exercises+esl+pdf PDF link annotation
    • https://habibitours.org/ckfinder/userfiles/files/60208218192.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/0302913cff75c223749ec18d2a103367/51655330487.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/gevajozabexatuj.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/7aoj8g2d55f808b28hljl5uk90/letagide.pdfIn PDF document text
    • https://shopexpert.com/app/webroot/files/userfiles/files/sovemivogik.pdfIn PDF document text
    • http://alpinedelhi.com/userfiles/files/fegezolojirobilelexevetax.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c42a901fd01---zalepezoveboparozawapifi.pdfIn PDF document text
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/28456315754.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/tuxiterejoferu.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/jumalalogolafevojokizepum.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/s3lhgdpqts15m216m1n78m9imd/gezazesemupen.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/logegavupivigelokeb.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b235093cff3---47259174354.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/divoribizuwasafajevil.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081047f8c509---jakinuraxerapozaxaf.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/48254334567.pdfIn PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/19105993170.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/dumomufofalapukajum.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a888cd71114---timibobalipowepumipoxa.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/xemuruv.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/26eb7835c5bbffe37179efe9146fa2dc/43347445948.pdfIn PDF document text
    • https://couvreur-hautdoubs.fr/internet_new/images_et_fichiers//file/kuzekirenibegamunoj.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/polegozexute.pdfIn PDF document text
    • http://turbotechnik24.de/userfiles/file/58653115074.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/8410327116.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/81714518181.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607005662feaf---69372079936.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_off0000d67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8E 17532 bytes
SHA-256: e0770017847f59764ba8ba6b44174baca87f00b215c7ba4894d7ed1ba0a863bb
font_02_sfnt_off00011c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C11 11080 bytes
SHA-256: eeaa1e6731d5f3d2e1d3733046120f36075c4e1d7630a940cbc8009380d11cad

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