Malicious PDF — malware analysis report

Static analysis result for SHA-256 382ee7642f01688f…

MALICIOUS

PDF

85.7 KB Created: 2021-06-28 05:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e044bf77d8415c0fb898a6596d83c2af SHA-1: 97de351eb49ea2be6d7baff1e47b3e7863a2105d SHA-256: 382ee7642f01688fd5360274f2f9907e33b0ad67b1e7a84e724389fe9f58b07c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to phishing sites or further malware downloads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests these links are designed for SEO manipulation or to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://crewmak.ru/uplcv?utm_term=crawling+with+one+leg+out PDF link annotation
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b88ab0a6631---98948502271.pdfIn PDF document text
    • http://whewfamily.com/clients/12004/File/57071070142.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/pikekege.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/4335fff329efa2475fed14ba6450609d/viwusexineludunem.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/94692091070.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/e2e2611e02e0c59aec97bf9273023417/mekepalinufilivabuban.pdfIn PDF document text
    • http://sciattella.net/images/file/nozetexiwukusuvubixegej.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160acf340319a8---lufoworasetegigagem.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/c1c7aede35e4c46e76f339f43df2135c/52719311858.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608baaa658ee3---wurilusadiguxixa.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/9i7l90std8bn1j2o05vhsh1kno/gisofatanewurevobodubimin.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/vawiroredeku.pdfIn PDF document text
    • http://goref.ru/files/file/falal.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/45666156753.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/fopaxofupamo.pdfIn PDF document text
    • http://red-persimmons.com/upfiles/editor/files/kuvotuvawekoz.pdfIn PDF document text
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/4b33bcccaa4917ca580cbbaeacaa9cec/vifezisereb.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/wowemofebaxowu.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9fd8d3961---72236591123.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16070ba3620129---bulijuxug.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/bd7c917fceeba02a983dde4e9c28ab0d/32700457691.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/winudanopisugaxurek.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_off0000ee79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001068b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068B 16784 bytes
SHA-256: d2b98951bd2095eb5f660e8530f685bfa0ce9dc9edc4c89315a5a14f2c2c316c
font_02_sfnt_off0001325d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1325D 10436 bytes
SHA-256: 1c71d0d1e4b88b87d5fa2f6fc2fdbe49f34d6997a3a33fdfee8953c64fb52070

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