Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac33067133bc234d…

MALICIOUS

PDF

60.3 KB Created: 2020-11-02 06:31:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a688112050a5e2e6b08628a8bdc892da SHA-1: 08759fc39effac5d6900865aa84bb0ad66b0bdd0 SHA-256: ac33067133bc234dc16a263b3c4b750a235e49223aeea6e78766e8c4f4767d3e
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.me/pify?keyword=siddhartha+pdf+full In PDF document text
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/koxevexonafolegalig.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/sekexumoravisubemale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370267/normal_5f88c84e8885d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409604/normal_5f9e1500b53d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372360/normal_5f8c7f21737bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f8742dd9f78c.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/2490472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412378/normal_5f9a2513254b1.pdfIn PDF document text
    • https://gifimaxenewurup.weebly.com/uploads/1/3/4/4/134458705/09e5b79f534bdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393635/normal_5f9a670a81b98.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/1/0487/9731/9333/files/48904180058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bee96ba0-8f19-4745-996c-b59ebfee89cd/vulejazezotalofegaxazevog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9050/0001/files/raze_3_unblocked_at_school.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7655 4600 bytes
SHA-256: 85aa27f0d053fd7d6709b54424de0072903361b75d29a67954e07294207ace21
font_01_sfnt_off000085f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85F9 5136 bytes
SHA-256: 57ee54d7d51bb5e614d4c4161076647820ae7c69b0ec45a6b42888eb8cd0105c
font_02_sfnt_off000096c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96C9 13016 bytes
SHA-256: dc8dc90ecd04b5b71c857c53452a1ce0b868fbd2b5977e9266ccb0390145e47f
font_03_sfnt_off0000be8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE8B 16164 bytes
SHA-256: 8a02c072109af67031be64374fa0b0107fc8569691e792053b23713e8e8f99b2
font_04_sfnt_off0000d3a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A9 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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