Malicious PDF — malware analysis report

Static analysis result for SHA-256 5899bd1549bbd0b7…

MALICIOUS

PDF

91.4 KB Created: 2021-08-08 23:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c39dade09c0e3156ac61653b7a996b82 SHA-1: 63f41ff258a04279def3411efdd28aaf84ad00f6 SHA-256: 5899bd1549bbd0b7d8bfcd55c3b6b26383be538d5cb6baaabee45cf14ff2e8aa
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9384

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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=nebulous+apk+hack+2020 PDF link annotation
    • https://nirmalujjwal.com/public/ckfinder/userfiles/files/nilanemedosujuweg.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d128cbcbc3---20061363355.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d08d218913---jagavesidiwesanedefoto.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/lojinasimegagatomuke.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7c0422b19---39423008375.pdfIn PDF document text
    • http://anquocrealty.com/uploads/image/files/demikitig.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34a35aca7c---22588938717.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/zawenefajobesasolalu.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/61385542671.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/81830434717.pdfIn PDF document text
    • https://mrdak.cc/uploadfile/files/17912714106.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/botewewizexefirafikaz.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/10362098854.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c862fc60195---29676549609.pdfIn PDF document text
    • http://theettiares.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/32653404660.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/girazukebamedajegom.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077708dacf53---6001545362.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d853cdb7aa---xibuxal.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/71010131757.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/3e4bca02cd3d766981e3a7a71511f134/wulodo.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/174f04a95ec79911635ea84e7e5f3c1c/durel.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607054361d373---58366371650.pdfIn PDF document text
    • http://hkt-optics.com/hkt/images/userfiles/file/junojikemusof.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/95997522973.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A2 16132 bytes
SHA-256: eb83fb48a2f60ac59fad768156047f025764cad4052c8f34695a9c8dd2456ad8
font_01_sfnt_off00010c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12425 18708 bytes
SHA-256: 01b7fb6126f1db65818785edb60f25e38b542f6ec5869a73f7077fa402de51b9
font_03_sfnt_off0001530f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1530F 10628 bytes
SHA-256: f2977f6bc474afcc16ca71ef2f9d58bbe3662b2ea038709fa2290d44b1f412b3

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