Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a9dba4f90b7902…

MALICIOUS

PDF

79.0 KB Created: 2021-03-14 08:54:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 61560fd385e57fa3d9f1df296c6b4288 SHA-1: ecf11ad8fe87e8c1699e53d7dcdd4565f0e178f2 SHA-256: 42a9dba4f90b79026256d11ac9b1f9a39e320ca19407ab626cd2e04c9784ca28
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to medical cards, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 4

  • 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://golowaki.ru/strik?utm_term=how+to+apply+for+medical+card+in+michigan PDF link annotation
    • http://techanomic.com/rally_coach_kagan0r7j2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486751/normal_5fd276c9b0282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481270/normal_604375e6efdd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417024/normal_600ae0645c0f4.pdfIn PDF document text
    • http://fosipuzo.mypressonline.com/last_child_in_the_woods_summary_by_chapter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485693/normal_6026e3b9bb55b.pdfIn PDF document text
    • http://inmyshtangen.xyz/2048_hexagon_hackqlbps.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493597/normal_6003161b30f6d.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/discovering_our_past_a_history_of_the_united_states_early_years.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417032/normal_5ffdab8dbb70a.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/ronofeno.pdfIn PDF document text
    • http://ketaton.mywebcommunity.org/53545652723.pdfIn PDF document text
    • http://wugipesirexoxof.mygamesonline.org/livros_apcrifos_minhateca.pdfIn PDF document text
    • http://tamogulaganero.scienceontheweb.net/91857485628.pdfIn PDF document text
    • http://timurberg.ru/reloading_supplies_9mmi0vu1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383681/normal_602ae9fd8e086.pdfIn PDF document text
    • http://greatholl.com/vanajenadowo6kwfk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/how_to_install_landscape_lighting_transformer.pdfIn PDF document text
    • http://pogetowem.onlinewebshop.net/79418929222.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/78982675849.pdfIn PDF document text
    • http://jomupaz.myartsonline.com/20368813366.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/32173744958.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/21153480288.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/55324626453.pdfIn PDF document text
    • http://vubelifijam.atwebpages.com/57792484166.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/binukanewosos.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF624 5548 bytes
SHA-256: c9e609eb2f5eed9230f09bc00ccca8611a51aeca640225fab989c26b165c5ab1
font_01_sfnt_off000108f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F4 10488 bytes
SHA-256: 14792e02bcc21e70e02121f9f961db2f5832c207797b82932f09212d4dd0aa47

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