Malicious PDF — malware analysis report

Static analysis result for SHA-256 491a60b516af1262…

MALICIOUS

PDF

68.1 KB Created: 2021-01-29 04:14:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 07b9962ab46a7ee09a72e2336ae49234 SHA-1: 855e34ff16de5a10e0e562c8101df85d824b88e8 SHA-256: 491a60b516af12623cadb80d3f13564025efd1f29d62ddbc0a026fd0cbb22e5e
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://crophysi.ru/aws?utm_term=new+audit+report+isa+700 In PDF document text
    • https://kelezisexuva.weebly.com/uploads/1/3/0/7/130739204/9778991.pdfIn PDF document text
    • https://wadonado.weebly.com/uploads/1/3/4/6/134677460/lasukokorix.pdfIn PDF document text
    • http://secureappeal.com/21623965852mwker.pdfIn PDF document text
    • https://cdn.sqhk.co/wokowuvawuz/FPuggje/fudadifo.pdfIn PDF document text
    • http://bahis-sikayet.com/download_star_wars_galaxy_of_heroes_for_pcaq17d.pdfIn PDF document text
    • https://nupirunu.weebly.com/uploads/1/3/4/2/134265900/gofepute.pdfIn PDF document text
    • https://guvikaki.weebly.com/uploads/1/3/4/5/134519546/sagif.pdfIn PDF document text
    • https://faxojoduso.weebly.com/uploads/1/3/5/3/135351685/mezixox-jamoxa-wepogive-kobuw.pdfIn PDF document text
    • http://dusosax.66ghz.com/83326253971.pdfIn PDF document text
    • https://kevulukopefot.weebly.com/uploads/1/3/1/4/131453006/7f1a75.pdfIn PDF document text
    • https://cdn.sqhk.co/zezaxemepe/mggCWsU/princess_crossy_game_road_fund.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/jejulurowev/guvixekegov.pdfIn PDF document text
    • http://tinijev.epizy.com/28040761611.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/olanzapine_dosage_guide.pdfIn PDF document text
    • http://tafobinememen.epizy.com/punubi.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/bedlam_noun_form.pdfIn PDF document text
    • http://tukorokibenej.epizy.com/chemistry_apparatus_list.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/pipagugagamujetoxe.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_off0000cdbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBC 5204 bytes
SHA-256: f22bb1c777fb8643fe85a84121f08c21d67aada1283f994a70dcb8d43100ad45
font_01_sfnt_off0000df98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF98 10476 bytes
SHA-256: db30d9a2b0463ff019a8657db6a33e66ec642cbb15bdbbee6d93951a556421fd

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