Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc0791a2b272650…

MALICIOUS

PDF

74.7 KB Created: 2021-09-07 06:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 72b2532621586fa940065bf93e1f1738 SHA-1: 51db96a55e888cb1586ea37d27d13855ef752df9 SHA-256: bbc0791a2b27265030d01dce81c80dc09821e2912de328c2e1201f883bf8d9ea
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to distribute malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure of the PDF and its embedded links are indicative of a campaign to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a58303a2c4d---vuxibuvudobelunizakejek.pdf In PDF document text
    • https://bipalisdemo.dashindonesia.com/userfiles/files/51549704215.pdfIn PDF document text
    • http://milkexim.ru/imgeditor/file/teximazugexorerupaz.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/juruzi.pdfIn PDF document text
    • http://stonepigments.com/userfiles/file/zataxoligi.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/54783861758.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b42341f63---fixasakozalafe.pdfIn PDF document text
    • http://abc-tel.ru/data/File/tamizi.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/vi7k2lgvna7edsonasj5hu366v/funinaviragosekadaj.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/seropujuramezedijedu.pdfIn PDF document text
    • https://airshow-bg.com/file/51973103608.pdfIn PDF document text
    • http://tomnhenryanderson.com/clients/8/8a/8a1068334c160bb49438aafe8043afff/File/ledokixot.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/54360281030.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077057183396---duwabenizutubujux.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3c577fa36---15142498260.pdfIn PDF document text
    • http://ambulatorioveterinarioscapindandrea.it/userfiles/files/22566404059.pdfIn PDF document text
    • http://jfk1969nola.com/clients/873000/File/vinazudumuvufisipexe.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa3f78c1fd---25995715252.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/f9334109c43d2bdda7bc3fd8a41d5242/wozupo.pdfIn PDF document text
    • https://www.geo-decouverte.com/ck/ckfinder/userfiles/files/75600938103.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/1033c907ff079986cbd864abc645fa4a/tolerimusabamegarugutigid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=high+performance+audio+power+amplifiers+pdfPDF 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_off0000beb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB9 17484 bytes
SHA-256: a60d894041201b11f73b605eddb30b95d9a2ade772f7a6811f5954c72743d7e2
font_01_sfnt_off0000ebfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10412 11148 bytes
SHA-256: 658f5406fc060dc0cc9a27af2a110fe74574e1b64b3573ea512e009a2a50ea30

Open this report in the interactive analyzer, or submit your own file for analysis.