Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f554f8aeae0c5b…

MALICIOUS

PDF

72.4 KB Created: 2021-06-06 15:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 93d50d7d3b1801db8df5f1aa7736db6e SHA-1: ac9433018927de61d6df74d994fb064656722ea6 SHA-256: 94f554f8aeae0c5b856e811ec5f83ab7acb703fde3e14274c11b9434de9e75a7
186 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 6

  • 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.
  • 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://medvor.ru/pbw?utm_term=english+bulldog+puppies+for+sale+in+palmdale+ca PDF link annotation
    • https://sajinekud.weebly.com/uploads/1/3/5/3/135391411/9ef329.pdfIn PDF document text
    • https://juleladenoduko.weebly.com/uploads/1/3/4/4/134478401/kikefu_gatod_figegepu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467306/normal_60417726290aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459055/normal_60654d599b97e.pdfIn PDF document text
    • https://bodujifoji.weebly.com/uploads/1/3/5/3/135394102/medar.pdfIn PDF document text
    • https://mazogerivajusem.weebly.com/uploads/1/3/4/3/134341978/fepet.pdfIn PDF document text
    • https://safusugefivelu.weebly.com/uploads/1/3/4/3/134346528/pupej.pdfIn PDF document text
    • https://limumowitizuwag.weebly.com/uploads/1/3/4/5/134587832/7386746.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385030/normal_600eae27db59e.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/ca1f5f87-e6f5-4cfa-8e94-2733aed60165/lowes_appliance_repair_service_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da594aba-569a-4379-802e-b44fc921846d/vazetitadupasubejibazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f82159a-d464-481f-b2ac-244272684d97/ff7_prima_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe4af5de-a13d-4f4b-bee3-1b825e6d13fe/empires_and_allies_unlimited_gold_mod.pdfIn PDF document text
    • http://felefejimax.pbworks.com/w/file/fetch/144582840/latest_bengali_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b81ee286-59dd-4676-9298-d8876165e493/deadpool_comics_funny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74cc2c92-6db7-4780-a460-46fd8513642f/merudefisuwifuzikifapuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54f80a4b-11b1-4518-b35f-7ccc6bd8b0eb/phantom_of_the_opera_broadway_plot_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b672fa6-3067-48ec-a272-416420702ae1/60077967128.pdfIn PDF document text
    • http://mazibudikor.pbworks.com/w/file/fetch/144617784/fifesawebijo.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_off0000de91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE91 5668 bytes
SHA-256: 9f55fdc96369db47f893df68658d3403c19a5212f529a87be80898275e8f78f3
font_01_sfnt_off0000f1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B1 10192 bytes
SHA-256: 102cdea82a86891fb4a5515d4b7b339348644764dcc184676b2a9b800e954092

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