Malicious PDF — malware analysis report

Static analysis result for SHA-256 572ab8030908e892…

MALICIOUS

PDF

73.5 KB Created: 2021-04-02 18:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1f683e0ee4928baa4f5bb9778be74274 SHA-1: e972f17d040feec470ddc4c64f4af435a6b856a0 SHA-256: 572ab8030908e8929e75bb67ea0ea5f3b77b543f7eb3cf02624ad7ca4fdc54b4
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 0.9996

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://botokaw.ru/strik?utm_term=tesco+blue+dye+pregnancy+test+evap+lines PDF link annotation
    • http://jaralet.getenjoyment.net/zuxebatatubagijesigomuv.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/dhjWiaZ/todelolasabexototuj.pdfIn PDF document text
    • http://dotekebenutedex.scienceontheweb.net/amoeba_sisters_asexual_reproduction_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/VPNxice/horror_escape_room_games_online.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/bUngjgg/eliminates_log_jams_crossword_clue.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/hadia7x/defexibufifaw.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/626549142.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/g7eAsig/bupoteru.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/g8ViMun/komiwatax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lazuletezofik.onlinewebshop.net/alvin_schwartz_scary_stories_3.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/bossa_nova_drum_loops_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/android_tv_box_ir_remote_not_working.pdfIn PDF document text
    • https://184d393c-d2ff-49e5-bbcb-48626b1dbf88.filesusr.com/ugd/49be48_fcc17ebf38214027a18b7ce3aa841a34.pdf?index=trueIn PDF document text
    • https://a0d2adcf-75bd-42a9-a42a-c23e1c6e9e1a.filesusr.com/ugd/85c99c_2bf0b01891274c2582881bcaee062ce5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/pubelunujanuwurobuladowo.pdfIn PDF document text
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_4bed0c8ebda04aeaa8781201b820c33b.pdf?index=trueIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_5d546a3c82b74e8b830fcc9da04ffb75.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/reporting_anova_spss.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/rooted_facilitator_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/konopugifonerinawidopobor.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/witenapujud.pdfIn PDF document text
    • http://memepev.myartsonline.com/airtel_digital_tv_channel_list_with_number_download.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_off0000e2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D5 5492 bytes
SHA-256: f18810b02a27f5bcac0103eee30db5d5dab7bb439f3d14ae0ad681b0f26f5047
font_01_sfnt_off0000f596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF596 10260 bytes
SHA-256: b1dc9acf89465e2e061bd6fa1f6e27ba1b3dff0072ce11167ab0bfb342e64b30

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