Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bc8c616a47b81a0…

MALICIOUS

PDF

75.9 KB Created: 2021-11-12 17:22:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9e26b811b22a8d219ff90568d3ab010c SHA-1: 41711defc78c2d173998d110539addd8f3dc4fdd SHA-256: 9bc8c616a47b81a023e12116d6803b3b0fc1c93715dbd263a4cc3c5e99d677f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious content or phish users. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1617f3d3f20bdb---wekagalabagasilujaz.pdf In PDF document text
    • http://noithatdangcap.vn/app/webroot/uploads/files/kejubejozisogo.pdfIn PDF document text
    • http://airbaankhubon.com/userfiles/file/vulupujapanisuwa.pdfIn PDF document text
    • https://houstoncoinclub.org/FCKeditor/file/46400238900.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/d08eeb8c0a40f7587944738977a2d626/suvelaxuta.pdfIn PDF document text
    • https://salonrewards.ca/images/file/56429987004.pdfIn PDF document text
    • https://phukienbep.net/media/files/ruvaxakegaburizugabi.pdfIn PDF document text
    • http://notar-frings.de/userfiles/file/71393661664.pdfIn PDF document text
    • https://www.nhabe.com.vn/ckfinder/userfiles/files/35337643572.pdfIn PDF document text
    • https://santehsevast.ru/userfiles/files/5447393840.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/molozowe.pdfIn PDF document text
    • http://kanalizace-ul.cz/userfiles/file/79383589496.pdfIn PDF document text
    • http://nasfthr.com/userfiles/file/lamiwitosawejut.pdfIn PDF document text
    • http://apex-architect.ru/images/file/kowag.pdfIn PDF document text
    • http://toonesk.com/upload/55036487454.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/24989607247.pdfIn PDF document text
    • https://makojudo.pl/zdjecia/fck/file/fopinuboberilasexukebiv.pdfIn PDF document text
    • https://qkon.ca/images/file/nizobitoxedaxajogesebu.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/73753738448.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/rg1uk1rds8ahsl1q5f445tt8sq/saborotekukud.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ec035a3bc1---47939510611.pdfIn PDF document text
    • https://majubesar.info/contents/files/nilise.pdfIn PDF document text
    • http://gmart-express.com/demo/uploadpic/file/42280955239.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/l8a4p39mt3tjc8spvbmsfi8l4h/11995862576.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1615f6bea1947c---43023595626.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/4dZi1sgP-vI/uplcv?utm_term=accounting+for+managerial+decisions+bms+pdfPDF 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_off0000c4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4AD 11184 bytes
SHA-256: 5394e819e7634b6f6a559e1cb539ea87a701c62fb33035a624cc8b20eb95eb4b
font_01_sfnt_off0000de71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE71 16860 bytes
SHA-256: f26fb1ca557106bbc7ddf19332cacaa62a61b78e93a57e360c0e904b8184364c
font_02_sfnt_off00010a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A66 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef

Open this report in the interactive analyzer, or submit your own file for analysis.