Malicious PDF — malware analysis report

Static analysis result for SHA-256 854475295118515c…

MALICIOUS

PDF

84.1 KB Created: 2021-03-17 13:55:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b8f768d7bb012b837d71273ee0e4cbf8 SHA-1: 25899e2c4192d4db52a670881fd8df0a7609193a SHA-256: 854475295118515ce9da6e8ff8379f600d20f0386995b7e2668bc1238002fc36
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple detection engines, including ClamAV and an ML classifier. It contains numerous embedded links, many of which point to disposable hosting or known redirector infrastructure, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, appears to be a lure related to 'Paulo Coelho libros pdf el peregrino'. No scripts were extracted, but the presence of malicious links is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=paulo+coelho+libros+pdf+el+peregrino In PDF document text
    • http://lnstagram-office.com/52958829477ss50w.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/hdhagjn/cupcakes_afternoon_tea.pdfIn PDF document text
    • http://idealica-italiaofficial.site/63141016122mpfsx.pdfIn PDF document text
    • https://cdn.sqhk.co/bapulofuw/iZjf2ro/75013842673.pdfIn PDF document text
    • https://cdn.sqhk.co/naforokafe/jjaghjc/major_depressive_disorder_guidelines_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/welosezu/l9intz5/sesepub.pdfIn PDF document text
    • http://soldatskaya6.ru/does_evening_primrose_oil_work_to_induce_laborh21mn.pdfIn PDF document text
    • http://sejujanovemo.medianewsonline.com/48427446652.pdfIn PDF document text
    • http://xeberul.mywebcommunity.org/bitwise_operators_in_c.pdfIn PDF document text
    • https://cdn.sqhk.co/tusadopovet/bijI0Id/bizenevukogipojuji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://labotiz.rf.gd/nalifoxesebevukuges.pdfIn PDF document text
    • http://feruzituxiruz.rf.gd/wikeruwezida.pdfIn PDF document text
    • http://lusunumef.rf.gd/motor_hp_to_amps_chart.pdfIn PDF document text
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_db559571c85849dd97c80c2596c8e3b0.pdf?index=trueIn PDF document text
    • https://e6e31949-ba74-43ae-8e0c-2243355e89fd.filesusr.com/ugd/69e259_6537702f1ceb474ba7e16e7123ab18b4.pdf?index=trueIn PDF document text
    • http://mafonevaverazux.atwebpages.com/list_of_emotions_in_spanish.pdfIn PDF document text
    • http://vanabigura.rf.gd/vivarosixakijaj.pdfIn PDF document text
    • https://ccd4a2e6-63e2-4dcb-a02e-1ae1253dabcc.filesusr.com/ugd/059ff1_f9ec793c2a8f462a985b18cd613c73e3.pdf?index=trueIn PDF document text
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_762c6e41e7054f4299470ec131056c76.pdf?index=trueIn PDF document text
    • http://jiroribi.epizy.com/iliad_and_odyssey_summary_tagalog.pdfIn PDF document text
    • https://3f735f5a-cd1c-4288-bd93-adeff6e084d9.filesusr.com/ugd/bcc0e4_c09c9f3581e54fcd88ab963c2618e453.pdf?index=trueIn PDF document text
    • http://junixaz.epizy.com/full_enchanting_guide_minecraft.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_off0000e514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE514 5360 bytes
SHA-256: 49cc8cc53263d2920fec9ca950aacdb16e5b91d42f4343fe5a0043425678d73c
font_01_sfnt_off0000f731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF731 11692 bytes
SHA-256: 1ff3523d271977f2da07bbd7725e4f14cee813a7bfc8486d5e44342763b34a96
font_02_sfnt_off00011dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAD 16164 bytes
SHA-256: f469c5aa689aa4c1965481b78cfaebbf1c3ebdad2306c7067134b7b4aaa0addd
font_03_sfnt_off000132a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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