Malicious PDF — malware analysis report

Static analysis result for SHA-256 be1ffe2b4893ce40…

MALICIOUS

PDF

45.9 KB Created: 2020-10-24 16:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 26664e90131848c2519071ab856956e6 SHA-1: ea95594c479101e708668eafabed5ea6ee690e7f SHA-256: be1ffe2b4893ce4041eeb87f92bad20410346cb05a072b3b54df8aa7388e3084
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://ttraff.cc/aws?keyword=bring+up+genius+pdf+%25D9%2585%25D8%25AA%25D8%25B1%25D8%25AC%25D9%2585+%25D8%25AA%25D8%25AD%25D9%2585%25D9%258A%25D9%2584 In PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/efb1a7.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/ginawaxik-lavazetedebu-talovu-busepotalizunin.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/1/0266/9654/8524/files/53382804746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0582/8520/files/46947467005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8697/1029/files/biology_semester_1_exam_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0776/0301/files/81837933734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3237/5207/files/wuzimatotip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4086/5956/files/mcqs_on_classification_of_living_organisms.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/auditing_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/abrasion_testing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/sophisticated_vocabulary_words.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/fugewarafogejefapupoxeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7309/2246/files/fewinefug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/8686/4280/files/kefepitejokikifagibepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4739/3701/files/puzzle_cube_project_portfolio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8023/6702/files/light_and_darkness_scripture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6006/7991/files/96067022822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8699/5863/files/highland_climate_zones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2143/4524/files/78943744718.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_off00005b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B88 5016 bytes
SHA-256: 724c05e37b5a71736c58c4108992e2f53da8629b15c4da2941b9c1fee22c9490
font_01_sfnt_off00006cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB5 9864 bytes
SHA-256: 7853831250eb8e382d608a6519b12d7cde549d91a6dffde2a448b052aebed1de
font_02_sfnt_off00008eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB2 17340 bytes
SHA-256: a4493c8679e053cc0f6c5c7486d5263334a15bbf77d57ba62ca47305dda80546

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