Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60862ba51b576cc…

MALICIOUS

PDF

83.6 KB Created: 2021-08-30 23:17:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 22107d9b1e68c41038caaf0b1d738868 SHA-1: f7dcf5e5293375ed08d08b46c4ca66ea99726f6a SHA-256: b60862ba51b576cc0db28002effaa44587d5d23dec7edd38499f36dbfa4b9495
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting domains. These links are likely designed to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://futuralagoparking.eu/userfiles/files/betazesiwamozoxakurimolem.pdf In PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160955a82c82eb---ripojekodizixusozavewo.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/860627503.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b279da2747b---pilupujedefepif.pdfIn PDF document text
    • https://ksuskalology.com/images/file/ludosegelalagenezeri.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/fetamezuvesumigitidobufiv.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fcd3463af4f---49145349258.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/4503a63522ddbc4fe1d0641ad90475ea/ruvigiwikafagezevuturon.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c1166560a2a---48367145955.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160714085c10c3---putonizijed.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/56164322341.pdfIn PDF document text
    • https://parkettworld.com/upload/files/26437878596.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/49538536a79c2f7346592b8854050870/wamanafavibevusozupo.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/julikol.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/16104698816.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/54931232995.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607768893e605---nidojuvuruvekepuni.pdfIn PDF document text
    • https://invest.pl/userfiles/file/wusewewirevamizena.pdfIn PDF document text
    • http://infinivideo.hu/sites/infinivideo/files/vasubi.pdfIn PDF document text
    • http://pressvaluation.net/userfiles/file/jojudo.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852ca3dbe34---vegesu.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609faca434cf2---rivunuduteratumewejukiki.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16086078e35b46---tabakug.pdfIn PDF document text
    • https://www.rougeindigo.com/ckfinder/userfiles/files/95702918411.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=human+biology+questions+and+answersPDF 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_off0000deb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB5 11168 bytes
SHA-256: 2aa44346fa2a5ff167b407478ab2ebe654adc0f683724a4fc988e4f0bdbf3f96
font_01_sfnt_off0000f854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF854 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11066 18776 bytes
SHA-256: 03ec047a845f8bd76e79d90bc6087959b945f9b36c970d2225c30a99aa57e5ff

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