Malicious PDF — malware analysis report

Static analysis result for SHA-256 59baa3209b250662…

MALICIOUS

PDF

84.2 KB Created: 2021-06-28 05:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d34e0e7d21ef8cdc56961d439ff3907c SHA-1: 18438bd0e2429281bd2174e40099a27ae9dbc3cd SHA-256: 59baa3209b25066299defdd5d3faa1f47de1e5c21510e6ead3546eca25063771
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple distinct hosts, many of which are associated with compromised CMS uploads or disposable hosting. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://zdravi-kromeriz.cz/files/file/38660212534.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf6119d8e0---luwatilolujoboku.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609771311aa3a---karazoxib.pdf
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/e2bt119q3721gt9hu1sbcfnhins6grfm/95561663984.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/d91b1cdeab2835edc3f7e0997caccfde/tewinugabidulapuxotes.pdf
    • http://wami.cc/data/files/lixoxojajemuvadunokawekan.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/1dc2f99cc69759514c2e5801ab312ee0/60692460739.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b465a45c0d5---36726301822.pdf
    • http://portalcom-b2b.es/img/user///file/_0143085001619900386.pdf
    • http://m2m2design.com/userfiles/41857262215.pdf
    • https://cochleartudaskozpont.hu/files/xipidusadediz.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/4d2878690cfb9f0614d5230c7ecfaa4c/xajokarosiruxe.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc6a71b1d8---suwikaxiwe.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160b42aa746de6---16513010921.pdf
    • http://cdkkck.com/uploadfile/file/20210616034634.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cf3071ad8fc---xilepor.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b24baa1e090---74392551706.pdf
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/35020038450.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/85ahpjink8h13ub28p00mm6gs8/gevuzadepeme.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/ib7tndpfucr5ni45itu2p384ce/dasedixegamawofi.pdf
    • http://mxm-hosting.nl/img/editor/file/sajugijitugutawir.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/nenudimaruvawobowuru.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/6ck0d325tjmul86qvcdlkb8ig3/zudabawapefa.pdf
    • http://aweibel.com/Photo/file/64058040905.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+delete+sent+email+outlook
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e323.bin
85292648c496b6c21a53387c321b08a7d4262acd86f7af2547e14a5a10c415cf
pdf-font-stream PDF embedded font (sfnt) at offset 0xE323 10580 bytes
font_01_sfnt_off0000fb3c.bin
366594efca3b53058d402cc7f232b3e48ac2a38f634a705720c9b2bd49af4a54
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3C 17924 bytes
font_02_sfnt_off000129b0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x129B0 16792 bytes