Malicious PDF — malware analysis report

Static analysis result for SHA-256 b92a8dd2dcbf3fc9…

MALICIOUS

PDF

100.7 KB Created: 2021-08-18 11:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6827d7bbd7cc27fb96d45ec70b424f85 SHA-1: d9f7b3c4398398ccd8837e9306a2f4a470399db5 SHA-256: b92a8dd2dcbf3fc9fa8a216c075dfc3163432a4f84df9e2354ec9d27599f0468
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of numerous external links and the PDF structure itself are indicative of an attempt to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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 http://ever-pioneer.com/upload/files/vimuximonuperi.pdf In PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b613a64e60e---futewuboxosigokuj.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/a4d7f3a9af78ba2776c9368cf85ec50c/93571378055.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/18122736942.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/12296264869.pdfIn PDF document text
    • http://hindel-relax.ch/ckfinder/userfiles/files/jojebanojag.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609441d689bb0---80563314807.pdfIn PDF document text
    • http://uralcomservis.ru/crn_fls/crn_files/bavomokenulafulogi.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/424199677.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/afthqavu90psor2ec8fd1obdsd/29980356392.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/kagaretitebivij.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/87310573382.pdfIn PDF document text
    • https://harmony-lazienka.pl/Upload/file/bawaxolitafojezulenerov.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160924ca2e34fc---93850130877.pdfIn PDF document text
    • http://tpokebar.com/uploads/files/40876379773.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210713220217_ggfm1p.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906985316fa---torewifezumidadub.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/76201398540.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/4f553f1c2658223a049f16f760a11704/fodonekukiresegasiworu.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609e01072a1ec---96802808366.pdfIn PDF document text
    • https://bulgariapools.com/contents//files/14088574247.pdfIn PDF document text
    • http://ehhs1969.com/clients/6/67/67a0fa02f482ea8575b7cec7429e43a8/File/8340470299.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/xozasezolemux.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/4aa9u5m17vnqllbvrvdbdr3ns4/63259367910.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/39002736450.pdfIn PDF document text
    • http://jucal.es/images/file/zumawimekuzofijunojul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=princeton+review+sat+math+2+pdf+downloadPDF 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_off00012504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12504 11156 bytes
SHA-256: f39d2d70cf38a35a3510ca4158f09f8d5cb76ce0073642574eb08ea979d9c977
font_01_sfnt_off00013efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EFB 16632 bytes
SHA-256: 61079800cf193e533482c0093856d492f2588c6d0a4638323738b5891924f071
font_02_sfnt_off00016a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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