Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddacd7e0f2f97d59…

MALICIOUS

PDF

85.1 KB Created: 2021-09-04 23:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a5dbbe669c020c73c2ed6d6dcea94b69 SHA-1: 80f30599561fa9cd2d427f2269588fbbc6ad7a9a SHA-256: ddacd7e0f2f97d59abc941e8c0bef703d16508167b7ca8c50a44667ee948920e
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to websites that appear to be part of a link farm, with some hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://rajeshjshahani.com/clients/d/de/defaee86e9f1fedea086b53a5072ac2c/File/ditemizonijupedawe.pdf In PDF document text
    • http://eraucheta.ru/uploads/file/91154545231.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/64482990365.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16101355920ceb---zegatanobidebefowaresudu.pdfIn PDF document text
    • https://xaydungdonggia.com/app/webroot/files/images/pages/files/xetupobobife.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a19b1f98d05---262811772.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/simuvo.pdfIn PDF document text
    • http://bscartridge.com/pic/32054781288.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c34fc995794---81266389266.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/wekozuwudogibomubonu.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/44458633039.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/41721337555.pdfIn PDF document text
    • http://sgrdinstitutionspandher.org/sgrd/userfiles/file/87495220270.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/f169648aad960e3071d7c3c85a7a078f/53906437944.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/c74ce2890f65848a2452cbb153a4ef1f/83967032562.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/7363165221.pdfIn PDF document text
    • https://reitinguok.lt/userfiles/file/tujodawofatabuwowurol.pdfIn PDF document text
    • http://varosom.hu/userfiles/files/bekowafakababewaluluref.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/08fe00cda415d55ab553eb2898038371/kimagogiwubelofumutaji.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa67a42c76d---jezetivobi.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a7af720281a---vabegudusin.pdfIn PDF document text
    • http://myshopekerala.com/userfiles/file/54597176587.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc2c50cf82---57394585532.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/69186500216.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=activity+series+single+replacement+reactions+worksheet+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_off0000e430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE430 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC42 18284 bytes
SHA-256: fdfe6ceabbf0d9d394fe7f58f23ae5a8e6dc9a236aaadfd27cfd24362a1d7abd
font_02_sfnt_off00012bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFB 11160 bytes
SHA-256: cb120f33eee74c93badf1dc69794ed2080959bd9f6e98807cc0eb2ade9824bb8

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