Malicious PDF — malware analysis report

Static analysis result for SHA-256 148674010a1d7bbd…

MALICIOUS

PDF

76.5 KB Created: 2021-03-31 11:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b00a493d6d16c72613b1ce1d8c2e28d3 SHA-1: d7d93eba1ff3c07f7120d21f1179ee85445b85b4 SHA-256: 148674010a1d7bbdbcc8637586ecd6202104b3060126fb015f45b09609f9adc0
156 Risk Score

Malware Insights

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

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 0.9999

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/strik?utm_term=tasco+telescope+luminova+660x60mm PDF link annotation
    • https://cdn.sqhk.co/jeporikate/9OifRut/super_mario_kart_racing_track.pdfIn PDF document text
    • https://cdn.sqhk.co/faserekino/RbB1Oia/ratoritozumoriwepotu.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/mokixetat/what_can_i_eat_for_breakfast_without_grains.pdfIn PDF document text
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_4ec5721a6309421dbe7baa9d2040e8bc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/emma_zunz_english.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/sector_46_faridabad_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/mupifajufitadiparukozuzo.pdfIn PDF document text
    • https://237a2310-9536-43ad-add1-fe73b840a51a.filesusr.com/ugd/8b319d_044236c82c4c4f7c9998be44173f2249.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/probability_and_statistics_for_engineering_and_the_sciences_8th_edition.pdfIn PDF document text
    • https://1dda4824-043e-406b-9213-03d4b91bb4d1.filesusr.com/ugd/7695bb_a8c30da6262c4c86af343ca868c5b531.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tugafebip/elegant_white_christmas_tree_with_blue_decorations.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/new_android_phones_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/how_to_use_bella_pro_series_air_fryer.pdfIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_5f461b244fd9405c831cde4e6edf061a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/bodo_video_3gp.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/bpsc_ae_mains_2019_answer_key.pdfIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_7111107b664d42a5b55e4a4c13201c65.pdf?index=trueIn 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_off0000eb54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB54 5356 bytes
SHA-256: c43c3e3ac1d83f54b574a809efb52d3f54eefe0189d50ce70ab8372ea57a0043
font_01_sfnt_off0000fd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD84 11304 bytes
SHA-256: 73afe17ea8beb33898287a7de0998a9f3b524921327b8a8032941428c08b477c

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