Malicious PDF — malware analysis report

Static analysis result for SHA-256 d10ac61ca61f9f4d…

MALICIOUS

PDF

84.5 KB Created: 2021-03-08 19:48:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 76f294df13af8aa81a1b982aa0680bdb SHA-1: 6f04adb459a31649136bb88b6599545c98f260cb SHA-256: d10ac61ca61f9f4d9b13c397c30ec3128dbf5b0fd574cec8a11b0e8f74ce8daa
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs pointing to various domains, suggesting a link farm designed to redirect users to potentially malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate an attempt to lead users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/award?keyword=fur+elise+piano+tab+pdf PDF link annotation
    • http://jivusibofonefud.mygamesonline.org/61602853078.pdfIn PDF document text
    • https://rujemezemomiwo.weebly.com/uploads/1/3/0/9/130969750/jemiwoxekokal-kesuvo-fupata-danavotojopibeb.pdfIn PDF document text
    • http://mivetys.xyz/adobe_acrobat_pro_dc_offline_installergdzzo.pdfIn PDF document text
    • http://femonejigajape.mywebcommunity.org/miss_peregrine_home_for_peculiar_full_movie_in_tamil_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414864/normal_5ffe9d9c61ea1.pdfIn PDF document text
    • https://xoxulesajoxe.weebly.com/uploads/1/3/1/4/131438427/41bace8d88c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452386/normal_600603941c255.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofodatop/jfVha05/castaway_cove_vero_beach_florida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_60373bd2b3d38.pdfIn PDF document text
    • https://togodinaxudare.weebly.com/uploads/1/3/1/6/131637070/06f542c6.pdfIn PDF document text
    • http://xxlmature.site/naluxomazapefomerematul3igwv.pdfIn PDF document text
    • https://cdn.sqhk.co/lilomovetum/BKOhjFl/20735005423.pdfIn PDF document text
    • https://gogabaxada.weebly.com/uploads/1/3/4/8/134852864/zesakid-pujotazufem-nokil.pdfIn PDF document text
    • https://wupixizot.weebly.com/uploads/1/3/5/3/135398135/livawiwiro_xepewilixegodu.pdfIn PDF document text
    • http://liko-sneakers.com/66454593234nineq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zikoliduxa.atwebpages.com/ben_hogan_five_lessons_stance.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/escrow_holdback_agreement_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/lularowimaw.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF23 5132 bytes
SHA-256: feb210c32cb3a44fcfc61ac3f2c3a713a47b2ae1607d18d5adceabe104d8b5a0
font_01_sfnt_off0000f095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF095 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000f923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF923 16912 bytes
SHA-256: 4b2757d4e798c1b3a9ee0e29a751cd8bfe164163a1f89ebce279472eae9161d1
font_03_sfnt_off00012d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D70 16120 bytes
SHA-256: 184efd0e138a9418359f6897f9ac56b5cd93cafbd57abf30711ac2aee7e18832

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