Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e34ff6e157c8e02…

MALICIOUS

PDF

72.5 KB Created: 2021-09-03 05:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: de496d840796b814b2f3e98164d38139 SHA-1: 32f15169ee9649ade2e75e597f89504ef69aa333 SHA-256: 7e34ff6e157c8e025ac2ebe7fb817589d560d562537f9ebeaf77ea834a79511d
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to compromised websites. These links likely serve as a lure for phishing attacks or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://crysiq.ru/uplcv?utm_term=rexnord+omega+coupling+pdf PDF link annotation
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/8cdsm6k49qlsml1diaglln4rqr/tufiwegonunikelemevanede.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa6aa125c5---98028704618.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d77a92aa2---20475562287.pdfIn PDF document text
    • http://theettiaresottawa.org/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/repeku.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/dc536fa133bfaa14281a3c1b8f627546/77211274537.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c784babfeb---82965002657.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/70038063065.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/93umah6fqdi3vl8m7qdrbavh4h/56763062204.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/kozesepifotujosodusa.pdfIn PDF document text
    • http://effektfilm.de/files/file/topidovudawuvozonunod.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/tisoretoxedanakipenop.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/61645879939.pdfIn PDF document text
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/44305503481.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/gurabafitinomi.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07e939949d---68100506041.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a92d74a3af3---55070975486.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609f90a2dcd19---58637558156.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f51202a81---58822956957.pdfIn PDF document text
    • http://design-klasse.de/ckfinder/userfiles/files/29439057861.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/lodejeka.pdfIn PDF document text
    • http://buren-kompanie.de/userfiles/files/gufimaludekozuzoduf.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///14186560275.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/84362515883.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/8nl0iii83h3i71r3ok6poh5qlp/76815859544.pdfIn PDF document text
    • 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_off0000b9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9D7 16112 bytes
SHA-256: f63cb00102fc8254bbbb8bd54c27694bb3fc511b4e8bb3e5cdcd640eea2e78ae
font_01_sfnt_off0000e376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE376 10944 bytes
SHA-256: 0c026b0735fd75e0f5154581d730ae8c8e9a36b531614aad764236735e6e0f36
font_02_sfnt_off0000fc95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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