Malicious PDF — malware analysis report

Static analysis result for SHA-256 f324d0c613a45e18…

MALICIOUS

PDF

74.5 KB Created: 2021-03-15 09:24:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0978db301b388104fab46128787f6b26 SHA-1: 149dbbcb6fb81d179fcab48d8807f4655dea225d SHA-256: f324d0c613a45e18592a5d3073da4e048a45e8fe6d9bfe28de226006c1796274
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 0.9999

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://resalured.ru/award?keyword=hospital+clinical+pharmacy+pdf PDF link annotation
    • https://zemabata.weebly.com/uploads/1/3/4/6/134677216/9347278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447253/normal_602892a0afd58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392857/normal_5ff0686744a5e.pdfIn PDF document text
    • https://gugewixurot.weebly.com/uploads/1/3/4/3/134393699/4763645.pdfIn PDF document text
    • https://gisijenoxumo.weebly.com/uploads/1/3/1/4/131437849/jupatazemorepega.pdfIn PDF document text
    • https://sexevegafuxa.weebly.com/uploads/1/3/6/0/136083832/kagaxudanoraj.pdfIn PDF document text
    • https://lokejefu.weebly.com/uploads/1/3/5/3/135301848/1902003.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/dukexajuj/16928693919.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/do_androids_dream_of_electric_sheep_empathy_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35749efb-2ff8-4091-8428-3d8c418f9a06/wozofefijurovaxidaruzosag.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/how_to_clean_my_briggs_and_stratton_carburetor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01e106ed-a75f-40ca-b7b8-35f252cbef2b/what_are_some_operational_goals.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/director_appointment_letter_template_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/easy_guitar_chords_tabs_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afdfde9f-9cb3-464a-ae04-f8fd2f481c8b/91259557426.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/godfather_speak_softly_love_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ddda7d9-6cb1-4b45-b9e6-7d1caf68974e/amy_hempel_in_the_cemetery_where_al_jolson_is_buried_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/55866417719.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_off0000e5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F2 5456 bytes
SHA-256: 31d31c12a56e24cbb188c07ae3fb4a2a5b3d59efac57fd5b313b941a8adf9474
font_01_sfnt_off0000f85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85A 10860 bytes
SHA-256: f4e40bdbabe75f433e9a51fa8d0a13b1fc598498a9dee3fd1a3d0ea920ebcbea

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