Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8053699bf34604a…

MALICIOUS

PDF

80.7 KB Created: 2021-03-30 07:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 002afbc7c69d29d3c7d1745fa65ae24e SHA-1: 9ea338c20ae20afa4bfadfb69084178ab1b2a8f2 SHA-256: b8053699bf34604a0b9d5c485cc0243d01c906d007e4c99c718d7981ef99e01d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=a+brief+illustrated+guide+to+understanding+islam+book PDF link annotation
    • https://cdn.sqhk.co/divabasom/gYW1ghj/best_wedding_anniversary_cake_images.pdfIn PDF document text
    • https://cdn.sqhk.co/namulofilox/7iejgd1/helicopter_strike_battle_3d_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413113/normal_5ff2409c43fcf.pdfIn PDF document text
    • http://gedozudusinap.mygamesonline.org/diagnostico_bacteriologico_das_enterobacterias.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_601a30ac2d67a.pdfIn PDF document text
    • http://larebalin.mypressonline.com/accounting_for_management_palanivelu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381531/normal_5ffb2068970c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469860/normal_6032f27901079.pdfIn PDF document text
    • http://maluxevuno.22web.org/manual_de_bpa_agrocalidad.pdfIn PDF document text
    • http://gididowofugu.iblogger.org/wawelotuxuzakeku.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/memji5u/31981761059.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372104/normal_60015cbe4892d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_8f7ed5883b3b40ff8091865838803a78.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5376fb78-77cd-4ac1-a270-49641a07d91c/7_habitos_de_la_gente_altamente_efectiva_resumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ab4544a-a8c2-4067-9dbe-f9be9bd912f1/falenuvuvafoka.pdfIn PDF document text
    • http://nabasuxogakuwet.epizy.com/77857722594.pdfIn PDF document text
    • https://c2c662fa-00ac-4c69-bf5d-04da7d6c99e2.filesusr.com/ugd/9b33c5_93cd90108be64ba0b3a55d99c84c857e.pdf?index=trueIn PDF document text
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_d5eb83cc034a4b43af209b45a15436e5.pdf?index=trueIn PDF document text
    • http://togalufunepobaz.rf.gd/inside_micrometer_calibration_procedure.pdfIn PDF document text
    • http://nogobixa.epizy.com/dipapavefiwetaxus.pdfIn PDF document text
    • http://revudipepofaten.myartsonline.com/48104252864.pdfIn PDF document text
    • http://wilaroxu.atwebpages.com/learn_to_play_guitar_chords.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_off0000fec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC7 5420 bytes
SHA-256: 9d0e856e09d237bd0504db0202eccbb16f9a08fd02ee8b2698f60ce064a6350d
font_01_sfnt_off00011121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11121 10476 bytes
SHA-256: 86341ee37010e272e326a04543f24c5c6378852963600ab01adb9b70de1e4114

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