Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0e5d44570fa05f3…

MALICIOUS

PDF

78.9 KB Created: 2021-05-03 10:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 844092933de391ca906734b4d3b786c6 SHA-1: 118f45a45c20b947277dc6533008be7c76d7c8aa SHA-256: a0e5d44570fa05f3a62c8d9320c99cab54c7daf410dd88fc684e0d7e805f86ed
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=why+is+my+anker+portable+charger+not+charging PDF link annotation
    • http://nimidarizul.22web.org/betoniguxadajige.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/nisoxow/51718112477.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/80019315880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4005b37-243f-42e5-99f7-2a4ad70d85dd/fish_farming_business_in_nigeria.pdfIn PDF document text
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_9d918d7a6c1b479487269d3e8b85906a.pdf?index=trueIn PDF document text
    • http://nisifibuvez.epizy.com/jelim.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/69627901383.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/35948139630.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/how_to_play_lust_and_power_game.pdfIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_8a316893ba4a47adb2fb01ba6d37d47a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/lixusipuratuwopaza.pdfIn PDF document text
    • https://f568b852-d776-40fc-afde-b4c2ef929a3a.filesusr.com/ugd/2d6fb2_7eff2205433e46ac85b70525daea1aa2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6285b6f9-2bd9-4527-af84-15af2b975271/how_do_you_do_orbital_notation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5be8c361-e42c-485e-b0db-5fb3e7599696/cast_can_you_keep_a_secret.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/zifejusipup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bee2aa9-a95d-453e-88c8-2410a07108f7/how_to_clean_vacuum_filter_dyson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeadaad9-4998-4f51-a79e-dea080019a8b/zojirushi_water_boiler_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/44985031036.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/69720314261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9d3b6ce-77a4-4f56-aa38-d0ca94c3c352/fleck_5600sxt_master_programming.pdfIn PDF document text
    • http://vakakumiwizexoj.epizy.com/38426451645.pdfIn PDF document text
    • https://e590c0d9-b694-44fb-9862-47327b30d8b0.filesusr.com/ugd/89363e_6f04936b5b054e26898a13940515638a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/choppa_style_master_p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23251a16-af6e-464b-be4f-611f9a01f37b/22951506293.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_off0000f592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF592 5668 bytes
SHA-256: 6d2d8546734afdccead9a03511cf54890d1b13c78cb86f23430751e9aa4f2e5e
font_01_sfnt_off000108bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BF 10800 bytes
SHA-256: 1ae1a81c6cc479cef52ad35ab6108f0dae14dc3faf511d1addc9af24439b240a

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