Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff1fd75e45216445…

MALICIOUS

PDF

80.1 KB Created: 2021-04-04 14:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 35b1fdbbd951c4e374ccf97ad1cc81bc SHA-1: 10070938388fd0cabed7e8638926dcbfcb3aa805 SHA-256: ff1fd75e4521644592fa43185e92a5ab356c27630eb0b8315bf8279aa7fc7928
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 0.9997

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://seumenha.ru/strik?utm_term=werewolf+game+all+cards PDF link annotation
    • https://molozotupinomel.weebly.com/uploads/1/3/4/3/134340336/ruvefodareju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451750/normal_5fd85e52983e7.pdfIn PDF document text
    • https://tasukivokojut.weebly.com/uploads/1/3/4/5/134592673/wiberexene-zevegi-legemo-kikuti.pdfIn PDF document text
    • http://giveaway2020.info/nixarirotaxofiburoxovgicr.pdfIn PDF document text
    • https://dekaraguw.weebly.com/uploads/1/3/4/5/134511216/selowafivogisaxeme.pdfIn PDF document text
    • http://gooddevice-online.com/rofaparagukizanivu76kys.pdfIn PDF document text
    • https://jipukikibowema.weebly.com/uploads/1/3/4/6/134633032/f819b0e9cead0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380080/normal_604fc38f3ec9b.pdfIn PDF document text
    • http://50offstore.info/ed_norton_jr_american_history_xjdjxe.pdfIn PDF document text
    • http://help-service-support.com/cyanogenmod_14_zipk1m8h.pdfIn PDF document text
    • http://rte-ita.fun/gopinixipugetomw4q6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474723/normal_5fe2e0ff9f1a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373782/normal_6016005d52a7e.pdfIn PDF document text
    • http://pogadai.xyz/cross_dj_sampler_appaeim1.pdfIn PDF document text
    • http://counterman.ru/anatomy_and_physiology_textbook_high_schoolbzlg7.pdfIn PDF document text
    • https://gikositaga.weebly.com/uploads/1/3/4/7/134773380/zefubizetenetapener.pdfIn PDF document text
    • http://lazerepil.site/649107532252earp.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/75f38e9c-5e7a-4bc1-9a0e-2a63fbb3a1e9/charlie_and_the_chocolate_factory_musical_violet_beauregarde_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa951294-e2c1-4da8-b2cc-a9eff40c805a/59443333058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89e33f51-752a-47ae-9b19-db9f94700685/55770077290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d34043c-c5cf-4627-b1c4-776350ba3379/61629914501.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_off0000fc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7C 5448 bytes
SHA-256: 8c0389ac8cbdb32ae7dc263b9b4227ec172ea70152719257a46b2b58a7c921ba
font_01_sfnt_off00010f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F07 10588 bytes
SHA-256: 2bbd62f9c8ec0e8903eb12985f077436d6649fe126dcc460536ae10a880977a8

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