Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8e0059852c423d9…

MALICIOUS

PDF

45.4 KB Created: 2020-10-02 02:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 213fb20e9b02781a6715d7cf0813bd99 SHA-1: a19d1909c7b455b56a0d144b871ccdc1ad2c0e78 SHA-256: f8e0059852c423d934efe7b34fdda7fa407c8a859ddcd6e2a2b5a66d49ba1d53
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ggtraff.ru/strik?keyword=la+biblia+de+estudio+pdf+gratis In PDF document text
    • http://files.rachelheltonmusic.com/uploads/1/3/1/1/131164009/sexarololanovogab.pdfIn PDF document text
    • http://files.ismsiliconvalley.org/uploads/1/3/1/3/131383924/3327115.pdfIn PDF document text
    • http://setoro.vipwoodenpens.com/uploads/1/3/1/6/131606755/8031461.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2280/9250/files/roll_of_thunder_hear_my_cry_summary_chapter_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6852/5218/files/20416388310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7801/7443/files/deep_v_bra_dd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2973/2245/files/what_is_the_meaning_of_invictus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0470/6074/6408/files/stanley_fatmax_1000_not_charging.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1568/3744/files/coding_schools_near_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2784/7576/files/craigslist_boise_free_cars.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0728/2847/files/97166033034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3082/2555/files/wejeluxakagid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8316/0983/files/affordable_care_act_north_carolina_plans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/7666/7542/files/weraxinikedajumuvafubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6659/7269/files/village_of_niles_ordinances.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/verekokikofula.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F70 5064 bytes
SHA-256: 092d3d0aace74339554a29aaad79e250d9aebb6f5df70f82186a099e83f64ca8
font_01_sfnt_off000060be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BE 10620 bytes
SHA-256: de3859bc573cec40d28041f65423377e68b8aeba5088c94885ed1b7c4ff188f0
font_02_sfnt_off000083c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C3 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848
font_03_sfnt_off0000988b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x988B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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