Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b2b1adeaf5206c…

MALICIOUS

PDF

123.2 KB Created: 2021-03-27 11:01:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4ee12df7dcc72b245bcc9381c3e5db73 SHA-1: 8f76bf5ca0a4f72c0fabf11937fb9115400110bd SHA-256: c2b2b1adeaf5206cc3eaa1829cc36816a7fc0fe84c20af320e4384d57e4eba73
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9995

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 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://pelibifir.ru/award?keyword=aspidiotus+nerii+pdf PDF link annotation
    • http://iqecoportal.ru/94663839325z97lf.pdfIn PDF document text
    • http://ig-mediateam.net/2020_honda_rebel_reviewsz0dt3.pdfIn PDF document text
    • https://cdn.sqhk.co/vutexexukus/Bx6Rigf/puzoladenesofavimoz.pdfIn PDF document text
    • http://sks-expertiza.ru/49561725473qlwkh.pdfIn PDF document text
    • http://daliadiago.com/xodaxudutomiwujixuy7i.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuzobisu/Rgfvvig/pedaw.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikewe/0tib81h/suzor.pdfIn PDF document text
    • https://cdn.sqhk.co/filovixedalu/gg8hdAM/firefox_private_network_vpn_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/WbjgzYX/1486706974.pdfIn PDF document text
    • http://mattelipsticks.site/40153523767sodx5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lofadezowudekeg.epizy.com/1725135268.pdfIn PDF document text
    • http://bugudejekizukem.epizy.com/99858096466.pdfIn PDF document text
    • https://3bdad275-8828-414d-9063-9532e035d791.filesusr.com/ugd/c67d0c_c36c3174f68140d2af954b4835374570.pdf?index=trueIn PDF document text
    • http://mapakipoborepuj.epizy.com/avengers_a_day_game_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/650adb48-656d-4bba-9758-ce5e7ac99633/memejusifafopij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5695bef1-2b67-44cd-b4c4-659f1c843444/81198521492.pdfIn PDF document text
    • http://lolowavedipugis.rf.gd/69104229846.pdfIn PDF document text
    • http://zesarosa.epizy.com/bideford_college_uniform.pdfIn PDF document text
    • http://buxidogekalor.rf.gd/33565349943.pdfIn PDF document text
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_ba6fe81a212047d0be4194d50e3a92ed.pdf?index=trueIn PDF document text
    • https://62619d47-812b-4c4f-a232-aa08d86264e8.filesusr.com/ugd/6d62c1_aaacaaea21db4f62b0a53d45b0b79b48.pdf?index=trueIn PDF document text
    • https://f38be386-5799-403b-9303-fb121113655a.filesusr.com/ugd/6f1aa7_3a2a290cd74a4798bef3a9cbb04a51e5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2641f75-480a-4211-9342-4ed84f5b4e7f/what_are_the_differences_between_diagnostic_formative_and_summative_assessments.pdfIn PDF document text
    • https://a72a44ae-2aae-4d6a-a6c4-235301d0a62e.filesusr.com/ugd/57436b_eda022f708a54f9ab52a974ff16fdca1.pdf?index=trueIn PDF document text
    • http://supisaminuwon.rf.gd/73677855338.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_off0001a97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A97A 4780 bytes
SHA-256: 43e6b1d5934071e23381cdf5dcf538b76eb79f67147158a94b6e8bdf6d2826be
font_01_sfnt_off0001b9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B9CE 10904 bytes
SHA-256: 064582e7bb60798f9e00820616910bd5a3be58f70b5571261e317e5c7d8a7796

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