Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e9d801f6592218…

MALICIOUS

PDF

102.9 KB Created: 2021-08-20 17:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: c2ef10e362618bba3f43d8f54df704f6 SHA-1: 4f01141f2525b55d10c98fe6a11f3cd5449b91fd SHA-256: 34e9d801f65922181be8f6db5844732e6148233d5669164ced84d2418127bec9
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links, many hosted on compromised CMS platforms, directing users to download files. One prominent URL suggests a lure for downloading an 'unlimited money' APK, indicating a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/286f94b670004c1710ad9fe11534bdab/gipojujudemefaxoropes.pdf In PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608701c66e9fd---73064900853.pdfIn PDF document text
    • http://willbramephotography.com/sudurovanegovo.pdfIn PDF document text
    • https://invest.pl/userfiles/file/79240464536.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/56520813120.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/654si68tmmr7mf8q6l0of1fil6/74418758508.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/44706883783.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///jakunedi.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d26598037---lolapoxevojajas.pdfIn PDF document text
    • https://aedwea.com/upload/foto/lubekamuvotevozegelep.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a32d78708d1---xikuzezavesofopav.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/lapudegalumotakubifep.pdfIn PDF document text
    • http://cy2hand.com/userfiles/zegegut.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16118af599672d---besuvonibisizofudeji.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/61990003525.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c85f7f2852---lopuborirewuzolenewuvedo.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/23d948e5aac0cf37c5dc1c0e9ae7a701/61668140292.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/17414289951.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/67090044780.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/ae32fafd3f8894917a7f7b369631781e/vitigefijogoretuvana.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=download+bussid+mod+apk+v2+8+unlimited+money+terbaruPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1A 11480 bytes
SHA-256: afbbe8bee3fa90c0f444ba0f9d3f70fae02726f96ce740bf2b041c2dfed502b3
font_01_sfnt_off00012625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12625 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E37 17476 bytes
SHA-256: e878935b438e898b5b0652b318abf35bae1e4149d9f41d6c76f3e753394318f9
font_03_sfnt_off00016c01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C01 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_04_sfnt_off0001813d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1813D 2688 bytes
SHA-256: 16bbb4382a47e5d7a8c4b7d57cf2c9ff795e1170ba42c274a19517904e9ed7e0

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