Malicious PDF — malware analysis report

Static analysis result for SHA-256 908e00e2a424c474…

MALICIOUS

PDF

80.6 KB Created: 2021-08-01 04:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c1edc725743f38720febbfc57f4de157 SHA-1: 7b3be10f1e325882ee258df99b2d2f5492cd1763 SHA-256: 908e00e2a424c474e02ecd510a06f0ead2f03bad0a087131c8b054274d1bdcca
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 file functions as a link farm, containing numerous URLs that point to compromised websites and disposable domains. These links are likely intended to lure users into phishing scams or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 http://enjoybowlramenandpoke.com/uploads/files/gapomopegipagorenetari.pdf In PDF document text
    • http://zaun-produzent.de/userfiles/file/35596783494.pdfIn PDF document text
    • http://cainghienbinhduong.com/uploads/userfiles/file/95947906021.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///dixukunirutapoles.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/1792348cb5c54cd61fcc41b4a3d57952/81336063907.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/lpvj4f052erfgbebfutt34bqv5/76705421057.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/gilajakavu.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/botepibinurojavulifajaxot.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/jesekenimiwababikadiwe.pdfIn PDF document text
    • http://planbmedia.hu/files/gifulorukajoxefajufuwuri.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/18bd400fed8406282101b8b250c369f8/zakegegib.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160ca1d4229db0---fulopafisel.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/18fdfc24f9d6b6f0b499e022f27d2afd/vejuliguwobasoroxekoru.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/d1a00f7c0711ef04967e0d28a760c4e9/96235100092.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/vasafavexowiwa.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/8232584178.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/vakere.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/e1d0dd4b409ccd53405f38fee491502b/wutuziwijonenifaxetoru.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/faa4df14d6b5b9bad715ec04ebd87df2/6309371539.pdfIn PDF document text
    • http://packamate.com/userfiles/radagiruzudeboxo.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/xosigakapusigirojakut.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608507b06da86---miguzixunomegav.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/cb1ca82a8430e1424f78cdb9873ac9d9/35528375634.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/335469785.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=achutam+keshavam+mp3+free+download+ringtone+female+versionPDF 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_off0000d148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD148 11564 bytes
SHA-256: adce76b78d6114c65a1108dce07e8334885c94442d5430a68da9e3e30b82e573
font_01_sfnt_off0000ec6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6C 17068 bytes
SHA-256: 613790a1a861ad7ebf44a29678a881079dbdb8c65a3577950b4d5195ca4a424e
font_02_sfnt_off00011950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11950 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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