Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcf6f68504b89dd1…

MALICIOUS

PDF

82.4 KB Created: 2021-03-12 21:04:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e11225e9231684504c03122166c5431c SHA-1: eb0a144125590d2284886fcddf2bb46e84f0211b SHA-256: fcf6f68504b89dd17665648846b52d98de7ef2ddaf40b62ba909ca7c12e72ef4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or scam lure, likely leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/award?keyword=alter+ego+a1+cahier+d+activit%25C3%25A9s+pdf+respuestas
    • http://italywow.pro/64203355959ysq1a.pdf
    • http://physcoo.com/dna_extraction_webquest_answersdbld0.pdf
    • https://marajivo.weebly.com/uploads/1/3/4/8/134878422/lufelezoxodununa.pdf
    • https://cdn.sqhk.co/kewusikata/dSXhfhe/52736004004.pdf
    • http://shopbest.online/gixosinumigazesewapanetury9695.pdf
    • http://websecurer.tech/598671378452wone.pdf
    • https://sagisumofag.weebly.com/uploads/1/3/4/8/134882066/ziriwusijororubi.pdf
    • https://vetitigozep.weebly.com/uploads/1/3/1/4/131437709/vozirebunegunejudev.pdf
    • http://help-mediasupport.com/iqiyi_vip_mod_apkxc5jt.pdf
    • https://didejigoximatex.weebly.com/uploads/1/3/1/0/131070501/suwuvur.pdf
    • http://ipai.online/voluvudosasudumibiw0wck.pdf
    • https://cdn.sqhk.co/duburijudi/WFG6Ujb/zawesigovinudejewizaju.pdf
    • http://vnds-v.website/samsung_c460w_printer_driver_download3dgjf.pdf
    • https://cdn.sqhk.co/munuluxel/weifnQl/22050523470.pdf
    • https://cdn.sqhk.co/nobixapo/eXhdKjh/events_at_the_factory_in_franklin_tennessee.pdf
    • https://geguwuwivoloko.weebly.com/uploads/1/3/1/6/131636947/tufixitapago.pdf
    • https://cdn.sqhk.co/pulazapusaw/cjbhaM8/lujiwipukizekagaje.pdf
    • http://jobs-ingenieur.best/gufajofikusojexipe69p9f.pdf
    • http://sberbank.link/how_to_perform_stage_brutalities_mkx1vbgg.pdf
    • https://cdn.sqhk.co/zotiperugi/je7ibAF/xipigigevetisuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_02b3dfac7d4a43adab723ac23616d7ad.pdf?index=true
    • https://ff06b2c9-6223-4357-b4d5-1bf3807c749f.filesusr.com/ugd/717131_493f2676398840e296c3a3e0b3a29e58.pdf?index=true
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_662b13b1127c486cb6b8d980047080c5.pdf?index=true
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_29b6f846eae54c39a09bb7bb98a81929.pdf?index=true
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_415a85ab8ba8407db405269d83afdc9c.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffdd.bin
24d41b4b535f2418f5fc8af89105878fdceab2ffdb2cc02057fdc045abe8a37f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDD 5660 bytes
font_01_sfnt_off000112e6.bin
bf48f2b3886b550a134eb9635266e7a3fd71bdc1380b115321f44d34718c94fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112E6 12212 bytes

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