Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc934e2b033e40fa…

MALICIOUS

PDF

55.3 KB Created: 2020-10-01 07:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f99269dc051576b987fa8df33d5fad1d SHA-1: ffa16e0adea49c9a65ef2c617cbfc73fa2c5485a SHA-256: bc934e2b033e40faffe77467957250a5cfab173e7dc2fb2201fd85b733dff8d3
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=bajaj+allianz+life+insurance+policy+details+pdf In PDF document text
    • http://files.triciadeed.com/uploads/1/3/1/3/131379875/kowit_gixidigexoj.pdfIn PDF document text
    • http://files.steamboatbiblechurch.com/uploads/1/3/0/9/130969430/vedebisa-kononomi-bixifezigeguz-gamozet.pdfIn PDF document text
    • http://sugibeka.tereficacademy.com/uploads/1/3/0/8/130815017/1011278.pdfIn PDF document text
    • http://files.swimbridgepreschool.com/uploads/1/3/0/9/130969809/newukaxum.pdfIn PDF document text
    • http://ratararat.lockermanmiddleschool.org/uploads/1/3/1/8/131856590/e5cceb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1864/7709/files/angular_6_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/encyclopedia_of_home_remedies_for_better_life.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4680/5408/files/82659085156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7333/1609/files/pirufamubuvozaredim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8954/3582/files/nomasivugegotuju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/60893055907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/84099338641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5969/9109/files/29883091309.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F2 5424 bytes
SHA-256: ec8c6904cd9c531414ee79ab67b7ebf45e935a1d17b3f116f28708d17b8029d4
font_01_sfnt_off0000968f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x968F 10564 bytes
SHA-256: 59e0962616c880953ea5eb53748deec22bdb966d819a9b2fca2cce07f470bdd3
font_02_sfnt_off0000bada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBADA 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8

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