Malicious PDF — malware analysis report

Static analysis result for SHA-256 008c95446a4937e2…

MALICIOUS

PDF

78.4 KB Created: 2021-03-19 16:27:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bd069e974fca26ec7251e563dd02eff9 SHA-1: b990843c04db66e434b56ecbe5bbb98385dd6870 SHA-256: 008c95446a4937e2bc21a0ec6d6f0ee4c31a27af7e19c0c7a773d61eef4e0cb6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous external links, many pointing to disposable hosting, and the document body suggests a fake payment receipt. The presence of embedded URLs and the link farm structure indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://bologen.ru/123?utm_term=acknowledgement+receipt+of+payment PDF link annotation
    • http://lidisafudototi.iblogger.org/beluta.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/dfp7yEA/best_bollywood_songs_mp3_download_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/gixotagokezu/EYVgihh/2053800216.pdfIn PDF document text
    • http://wofeboz.66ghz.com/fifty_shades_of_grey_full_movie_download_in_tamil_dubbed_isaimini.pdfIn PDF document text
    • https://cdn.sqhk.co/mojazejo/3RifjcI/excel_vba_activesheet._shapes._addpicture.pdfIn PDF document text
    • https://devigafaviv.weebly.com/uploads/1/3/4/6/134698058/2617069.pdfIn PDF document text
    • https://sokifavobal.weebly.com/uploads/1/3/4/5/134514189/ced43dedc6e335.pdfIn PDF document text
    • https://petozuxelilaf.weebly.com/uploads/1/3/4/2/134265439/ledazipoturab.pdfIn PDF document text
    • https://lofidebonejiniz.weebly.com/uploads/1/3/5/3/135334880/a72fdc32bbe.pdfIn PDF document text
    • http://sibomob.22web.org/56492185651.pdfIn PDF document text
    • https://cdn.sqhk.co/busanurutar/eUggSan/mod_herobrine_minecraft.pdfIn PDF document text
    • https://gerapulopenun.weebly.com/uploads/1/3/4/5/134587141/4979856.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_369d004b0f744dafabaced67e5cd761c.pdf?index=trueIn PDF document text
    • http://solodiwamu.rf.gd/titakoluvigitirutasazov.pdfIn PDF document text
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_17f875d242b34e28aa477da0d9b55908.pdf?index=trueIn PDF document text
    • https://7b4e975e-109f-4397-a679-93e438ff1453.filesusr.com/ugd/c33f71_78671e6d01424643bcb6ff3ff076c9a5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tenunud/pexelilezureziwus.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/grade_4_maths_symmetry_worksheets.pdfIn PDF document text
    • https://45884d5c-3037-4093-99f9-9b9c28a1e9f0.filesusr.com/ugd/3721b1_f4eeb95c9cb94358a9ddf9f6efe1b4fb.pdf?index=trueIn PDF document text
    • https://6762652a-e869-40f3-960d-1446d4066230.filesusr.com/ugd/55e6b1_c077ccea4b714026aef3c8270fcfad91.pdf?index=trueIn PDF document text
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_966bc2c15d8f45c59eb3af4e36b07837.pdf?index=trueIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_8321ed9a254647a288012cb760a0b96a.pdf?index=trueIn 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_off0000f4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C1 5544 bytes
SHA-256: 6d2759d8db1e5e42764b583babecbe0a15590c792d4f9f739c0c346c8e173b2a
font_01_sfnt_off000107b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B0 10692 bytes
SHA-256: 80997685b9673019e51dbd67d88064c3c70f2bd1d6e0728837fe18de0c342111

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