Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca3ab4cb3fda203…

MALICIOUS

PDF

70.9 KB Created: 2021-03-21 03:59:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1882b4779bcfa3684d62552e1f9430cf SHA-1: b8902f5c8d53755cfe51764f0e76165c4d07e21b SHA-256: aca3ab4cb3fda203417ecd7e023dd152aba1d965b69f9641e341ac29b43e0b32
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 0.9998

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://dafemum.ru/strik?utm_term=kitchenaid+electric+stove+top+cleaning PDF link annotation
    • http://wedofinoxa.iblogger.org/tefazagaxebeduguzipijo.pdfIn PDF document text
    • http://complerbnp.com/kuta_software_graphing_absolute_value_equations_answersfemf1.pdfIn PDF document text
    • http://leafester.online/how_to_become_a_master_storyteller_on_picsartw5kop.pdfIn PDF document text
    • http://avlto.best/el_poder_de_la_esposa_que_ora_dia_5ax1jq.pdfIn PDF document text
    • http://20970907.net/how_do_you_do_a_hard_return_in_indesignjjcwq.pdfIn PDF document text
    • http://reflectionss.space/wallpaper_hd_for_apple_iphonezde40.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e361a9fa-6106-4eab-8849-ff3af0082325/oreck_air_purifier_truman_cell_wires.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/pobobedapatimobebesupule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92bc5238-a7f8-4b28-b47f-7c4510b868bf/pazobuvuvol.pdfIn PDF document text
    • https://054d5c26-596f-48a3-87a7-0fc79031e5db.filesusr.com/ugd/599026_0ac1166e66bf4b229efe08ae62d5b7e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gateme/total_gym_1000_pulley_assembly.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/naruto_databook_4_portugus_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/bapapedofanan.pdfIn PDF document text
    • http://surafupomef.epizy.com/android_file_transfer_linux.pdfIn PDF document text
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_f970fc72d37e42fc9d32c193b02ecb3a.pdf?index=trueIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_5e05a44423b34ff8a47093795133d99f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b4cef4a-a029-4d0f-b9dc-fe0f0ef3f477/what_is_the_difference_between_relation_and_function.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_off0000d851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD851 5364 bytes
SHA-256: 01f0e6d752508e4c31f0440deb4f92f77d21122a36c2587a8e641fed22680de1
font_01_sfnt_off0000ea97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA97 10516 bytes
SHA-256: aea63052378e55d209baafd221e1c19a232a86a81a4fe89b7b124fb11de9d6c7

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