Malicious PDF — malware analysis report

Static analysis result for SHA-256 b068d71f69fa4e3f…

MALICIOUS

PDF

83.6 KB Created: 2021-03-28 00:11:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1cdf1aca8b738dc742090cf0205b92cf SHA-1: 9cad31256631e0ae3fe4e690cf0bd5c22c2c4498 SHA-256: b068d71f69fa4e3f6d8e87f39144cffabbd7a7a64103fd111bf9e25754c5d73d
126 Risk Score

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 0.9998

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://jumiwimov.ru/123?utm_term=registered+nurse+resume+template+australia PDF link annotation
    • http://manovina.mypressonline.com/what_do_you_do_when_your_keurig_says_descale.pdfIn PDF document text
    • http://item-mask.top/fathers_and_sons_hemingwaydoks8.pdfIn PDF document text
    • http://electorat.org/nelson_grade_9_math_textbook_answersae89x.pdfIn PDF document text
    • http://mosomupusafebin.medianewsonline.com/high_school_reading_passages.pdfIn PDF document text
    • https://cdn.sqhk.co/xidizizo/RHm8har/xatezapisunawopu.pdfIn PDF document text
    • http://tuzogat.sportsontheweb.net/55190232677.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/FwbxjaX/koxoguvojujejerusoriwemov.pdfIn PDF document text
    • http://sebevifa.getenjoyment.net/8993046092.pdfIn PDF document text
    • http://logunesunoj.medianewsonline.com/99332996227.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/iahgies/tiny_bubbles_tea_bar_marietta.pdfIn PDF document text
    • http://usecabinets.xyz/90710342716y6awa.pdfIn PDF document text
    • http://poguzozod.sportsontheweb.net/bioremediation_files.pdfIn PDF document text
    • http://litvinenko.xyz/samsung_galaxy_note_8_screen_repair_pricex6gn1.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzijaxab/cjhehgV/cartoon_network_artist_name.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vefovax.rf.gd/kepapixaputa.pdfIn PDF document text
    • http://woxikajir.myartsonline.com/sakeplan_voorbeeld_vir_graad_7.pdfIn PDF document text
    • http://wipapirub.epizy.com/19647224812.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/tanoroginuvoluguvafogen.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/how_to_pay_off_a_judgement_against_you.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/miverizagafotoguda.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_off0001070d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070D 5288 bytes
SHA-256: 25c9ebf56c7cc7bd0df3e444b1f1754d14da34f00771a296d76a00ae3a1f2613
font_01_sfnt_off000118f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F6 11400 bytes
SHA-256: 31a3d73eb01d742fafd040283270e1f80a7f5668693875e35f5d0a9039742a12