Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d76424ec7b05b8c…

MALICIOUS

PDF

84.8 KB Created: 2021-09-16 23:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 002aeec2006f9357f34b9c988f49297e SHA-1: fcfac3c153008b181ef2127eb79d48a7336e81aa SHA-256: 9d76424ec7b05b8cbfdc35465644dee3a9f54349e9ec40a17787cb253daf25e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to distribute malicious files. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign aimed at tricking users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://itfkarnataka.com/cvsprojects/SSK/Source/2.0.0/images/files/2680872906.pdf In PDF document text
    • http://geredekombiservisi.com/userfiles/file/78927773870.pdfIn PDF document text
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/29889063525.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/161311458b2974---36749652011.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/427247e5ceba1f478dbe7a1a71a7e15a/31387686919.pdfIn PDF document text
    • http://crystaltrade.hu/data/file/fejurogigusugekowuze.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/farinubujo.pdfIn PDF document text
    • https://langumeistras.lt/i/File/74278104029.pdfIn PDF document text
    • https://jnnjhansi.com/userfiles/file/1953557606.pdfIn PDF document text
    • http://honeycontacts.com/uploades/userfiles/file/12390537325.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/18090290001.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/47109956828.pdfIn PDF document text
    • https://happycolaborativo.com/uploads/files/32114681274.pdfIn PDF document text
    • https://promenade-perpignan.com/userfiles/file/digemukawozuk.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/55896476869.pdfIn PDF document text
    • http://ingore.cn/upload/files/bimabitamige.pdfIn PDF document text
    • http://urdu-hadith.com/survey/userfiles/files/jujofevuxiko.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139f60f26685---bimanelodakewaroxi.pdfIn PDF document text
    • http://unionasset.net/file_upload/spaw_upload/file/20210908181634.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16130733757e47---kenopomak.pdfIn PDF document text
    • https://seedomoretravel.com/files/files/kaguvegojulomej.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/b9dcq7f876rn1gk1s2krht989q/28623731756.pdfIn PDF document text
    • http://sowiik.pl/userfiles/file/43751165197.pdfIn PDF document text
    • http://colegiosantarosa.com/uploads/imagem/file/82828697685.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/seruwa.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/31324947446.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=download+turbo+lite+vpnPDF 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_off0000e5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E2 10608 bytes
SHA-256: 973003cc17addc4c074a08cdf542c0891244073280b0c6bfb2c7b051e6c6d726
font_01_sfnt_off0000fe01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE01 18420 bytes
SHA-256: 158e7e0fd0f6710f6abba5cf00b44baa5411190b587e8cfe11177d7dac0debaf
font_02_sfnt_off00012d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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