Malicious PDF — malware analysis report

Static analysis result for SHA-256 3896da63c15edec0…

MALICIOUS

PDF

416.6 KB Created: 2021-04-04 08:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3624d0629c0572c899d73c4fd9bbd8cf SHA-1: 9bdf6702daadfdb71fa261f674b7e19ca02f96dc SHA-256: 3896da63c15edec0cf1518b51a73ca2b21b929db74d694fe535d814bdad29223
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam lure. The presence of an external URI pointing to a suspicious domain suggests an attempt to redirect the user to a malicious site for further exploitation. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9034

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=writing+better+lyrics+pat+pattison+pdf+download
    • http://rasudilikid.mywebcommunity.org/69240171263.pdf
    • https://cdn-cms.f-static.net/uploads/4447916/normal_5fe7e2e56f467.pdf
    • https://cdn-cms.f-static.net/uploads/4414500/normal_606935ff028db.pdf
    • http://viniveba.mywebcommunity.org/87006574025.pdf
    • https://cdn-cms.f-static.net/uploads/4475586/normal_5fdb2f85c276b.pdf
    • http://feludekinopotas.scienceontheweb.net/2019_jeep_grand_cherokee_factory_service_manual.pdf
    • http://zebiripu.mygamesonline.org/child_and_adolescent_development.pdf
    • http://fatunatet.getenjoyment.net/runuwidewegasamalo.pdf
    • https://cdn.sqhk.co/gojinuma/hdghAul/43529260850.pdf
    • http://tanitebose.22web.org/video_intro_templates_free_online.pdf
    • https://cdn-cms.f-static.net/uploads/4483338/normal_600e5d74a2f44.pdf
    • https://cdn.sqhk.co/nukusigemug/LhikYjg/xomijumomonijakikunudepul.pdf
    • http://zobegodu.iblogger.org/a320_load_sheet.pdf
    • https://cdn.sqhk.co/rilixuzewiv/mW8uCme/97454439116.pdf
    • https://static.s123-cdn-static.com/uploads/4405925/normal_5fd076e967042.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wasuragexoledar.epizy.com/30708238627.pdf
    • http://lexekuduwowig.atwebpages.com/cambridge_advanced_english_exam_samples.pdf
    • https://s3.amazonaws.com/tazopaju/fuvanexatetedoguxodozire.pdf
    • https://s3.amazonaws.com/kuboki/how_hard_is_it_to_get_pmi_certified.pdf
    • http://kulebosux.myartsonline.com/nisagami.pdf
    • http://pibufesoxol.epizy.com/furnish_report_synonym.pdf
    • 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_off000635d2.bin
64028d30d3ded45dc6539cb896cdc11a3b278c332bbc11c4a9aadc0f77850f21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x635D2 5672 bytes
font_01_sfnt_off00064957.bin
9db3c46ada934b60220f66a518d6de246b7e5fe8aff838970d3c6af6d579f3da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64957 12784 bytes

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