Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f5d4f7249826ef…

MALICIOUS

PDF

84.1 KB Created: 2020-12-11 07:58:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 027a3b93414fac5f437f460ea4f06be1 SHA-1: 327baed544b8d63a6c6aa3bf1477e6a8998dbc4c SHA-256: a0f5d4f7249826ef051c150cbf7ed4ad3dd830fe4f5dbf55d189a1bb3c59e852
254 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://cctraff.ru/aws?utm_term=best+ecommerce+wordpress+themes+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4489440/normal_5fb6dcb3762bd.pdfIn PDF document text
    • https://budamasut.weebly.com/uploads/1/3/4/9/134903336/95052.pdfIn PDF document text
    • https://vuwuvaxurig.weebly.com/uploads/1/3/4/6/134649086/3727642.pdfIn PDF document text
    • https://gubitujon.weebly.com/uploads/1/3/4/6/134687035/f02cc533.pdfIn PDF document text
    • https://vifaniju.weebly.com/uploads/1/3/4/5/134507083/puwedef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410988/normal_5fa1e5084d04c.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/tupasominivok-nerarokisexa.pdfIn PDF document text
    • https://tapotupuj.weebly.com/uploads/1/3/4/8/134866757/puleba-rezoda.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/biguwel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jipowumat/77509624143.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc394bee2fce462bc9ccb38/t/5fc3f6d5bc819f1cf4539b04/1606678229371/columbia_county_register_of_deeds_portage_wi.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/logo_quiz_answers_level_4_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/oshun_spell_book.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10b4527a199023ab623ef/t/5fc56e952dd96f5918a540dd/1606774422967/buwokoxoman.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/i_lava_you_piano_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/the_art_of_rhetoric_aristotle_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/tokesefofefofo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A4 5292 bytes
SHA-256: 69bbfcb7e0acb6606a009eaa33c0320009265a989e4c058045f149afa70f8249
font_01_sfnt_off0001158e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158E 1800 bytes
SHA-256: 6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
font_02_sfnt_off00011e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1E 10712 bytes
SHA-256: ad8098707411c5730225ac33cb2a5293a4f0924fa2a73c5942e099176ceb18e5

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