Malicious PDF — malware analysis report

Static analysis result for SHA-256 1573ff80ce7ad742…

MALICIOUS

PDF

73.9 KB Created: 2021-01-30 02:14:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 22e4c73d12198249ebfc4ce40c2953ba SHA-1: f3ff336db1b0e46956029e1d739890b5eb9e9680 SHA-256: 1573ff80ce7ad742c7700344640bea1643dcb1710eb7432abd408d94b8117a15
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/123?utm_term=final+fantasy+5+job+levels In PDF document text
    • https://static.s123-cdn-static.com/uploads/4381735/normal_5fedbbb92ed88.pdfIn PDF document text
    • https://wekupadafar.weebly.com/uploads/1/3/5/3/135315244/619737.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383912/normal_600110d3197d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423696/normal_600085da440f0.pdfIn PDF document text
    • http://storeplus.pro/potion_punch_2_recipes8eijc.pdfIn PDF document text
    • https://kekulepolunan.weebly.com/uploads/1/3/4/8/134889268/jorujopobi-nefakikukom.pdfIn PDF document text
    • http://begemot.space/mi_album_preescolar_segundo_grado_20pk3l6.pdfIn PDF document text
    • http://bigtittybella.com/alexander_tamil_movie_free_downloaddwb3i.pdfIn PDF document text
    • https://tipurovus.weebly.com/uploads/1/3/2/7/132741110/patorarur_lisar_varowezobe.pdfIn PDF document text
    • http://berkeciftci.net/477616790280nzg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450514/normal_5fd7115442d87.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/geradi/beer_lambert_law_derivation.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/4252241839.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/free_email_template_builder_drag_and_drop.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/bombay_movie_all_song_free.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_off0000e49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49B 5120 bytes
SHA-256: 2dae8ebecc34755f657d03166f5a09ba075566bafec425925cc436705056691c
font_01_sfnt_off0000f63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63C 10868 bytes
SHA-256: 18783797b4e2ea9ace70cbc9ddc997baf99b447f450c4204c8b7c3745f712394

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