Malicious PDF — malware analysis report

Static analysis result for SHA-256 8960a5a67ab288a4…

MALICIOUS

PDF

43.5 KB Created: 2020-10-11 06:23:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: eefb404b44d2c0f7be9b22118cbabdb9 SHA-1: 9d0c52df4e70e7881ae745b964fa82c41bcd24dc SHA-256: 8960a5a67ab288a47cebf71c63c4195fc6fdfe2bce97a6a5771261fab05d5dc9
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://cctraff.ru/pify?keyword=what+does+wya+mean+in+text+message In PDF document text
    • http://files.faithrec.com/uploads/1/3/0/7/130775346/lipobojaxi.pdfIn PDF document text
    • http://files.waterloogutters.com/uploads/1/3/1/3/131382595/2010967.pdfIn PDF document text
    • http://files.nenevalleydragons.org/uploads/1/3/1/3/131381904/timigil_fapex_lulawe_relikewodo.pdfIn PDF document text
    • http://files.fauxmesticgoddess.com/uploads/1/3/1/8/131856381/gevaxil.pdfIn PDF document text
    • http://sekexebed.skinsalvy.com/uploads/1/3/2/6/132681670/bepexepigikuwa.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/1/0430/2775/9257/files/us_constitution_crossword_puzzles_intermediate_1_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9406/3269/files/nejerigoletepidifimafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4891/0491/files/mikes_tech_shop_brooklyn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/north_dakota_state_wrestling_tournament_2019_results.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9120/1700/files/bible_verses_on_leadership_influence.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0356/7515/files/bovakufavixaxaxinidin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7269/5719/files/ib_physics_hl_lab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5508/7267/files/collin_county_clerk_probate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9201/9874/files/77033914440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8197/4169/files/27955501156.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9F 5172 bytes
SHA-256: 65adf4abc49aa1d718122b8e75705cca49ac5ccf097dbaf8fd0215f49ea080c8
font_01_sfnt_off00007135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7135 9856 bytes
SHA-256: be16941a60ab3be7bc0cbc0b352b168419a110832b9d24670a96637e9ee66ff0
font_02_sfnt_off000092e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92E9 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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