Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeacd8c9946f885b…

MALICIOUS

PDF

111.5 KB Created: 2021-10-16 17:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 2b183e3c2fbd996ce8b8fcbbf462c2ee SHA-1: 16a1e4ed56ef1fd54bd69f9b7513c8971f49e063 SHA-256: eeacd8c9946f885bdf07e0ccde3c9fee6b66b52d26443e0c0cd619e3f234846b
156 Risk Score

Malware Insights

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

The PDF 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 external URLs hosted on potentially compromised or disposable domains. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 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://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/43912712912.pdf In PDF document text
    • http://tianlanip.com/filespath/files/20211007130251.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615a607046a31---girupukaxovojojit.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/gaguvufis.pdfIn PDF document text
    • http://regmac.net/userfiles/files/66043196384.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/winifulixovexotuj.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16168e0539fd62---566018185.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/477dea3r0hqlfml3mq08tdlhf6/87204430491.pdfIn PDF document text
    • http://drdj.friend-match.com/upload/files/resejufisanere.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16162d61768ae9---fexovojaz.pdfIn PDF document text
    • http://ecosdaliberdade.com/ckfinder/userfiles/files/32991552346.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/tebolatu.pdfIn PDF document text
    • https://preciseenergygroup.com/media/27320283641.pdfIn PDF document text
    • https://biroestarsa.hu/uploads/file/51929678561.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1615e545d92375---dodijipafozovifefodawu.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16159e5e85e874---nadamubuxakozelukakumufak.pdfIn PDF document text
    • https://mk-promotions.com/ckfinder/userfiles/files/fagumex.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/88533461200.pdfIn PDF document text
    • http://giteduguedesboires.com/userfiles/file/tujar.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/fofudewu.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/23D8k0Ec_6w/uplcv?utm_term=miss+you+too+funnyPDF 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_off000150ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150AB 9972 bytes
SHA-256: 3e157909e414dc31984ba973b2295384d4520c0c21d4e16cd533bbc0020fe3f0
font_01_sfnt_off000166ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166EC 18976 bytes
SHA-256: 39c80f69b124c9678c0f9c4608551440b19b083dc542979a6e8d6e463acf0940
font_02_sfnt_off00019874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19874 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1