Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe117d16414c863…

MALICIOUS

PDF

61.6 KB Created: 2020-11-07 02:22:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: bcafc00b2e0efed834f009bdd14eedb9 SHA-1: 6a403974fb7d1a81ad19033e807da2357e5d31af SHA-256: 9fe117d16414c86324a946018d88ac5930e1a5aa6b624e2de981fc9df8e49969
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/aws?keyword=write+the+expression+in+standard+form+5%252F3-15i PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379229/normal_5f9367f267c63.pdfIn PDF document text
    • https://topagolidokade.weebly.com/uploads/1/3/4/5/134502990/2802464.pdfIn PDF document text
    • https://febewizonobuwom.weebly.com/uploads/1/3/4/3/134311996/113a9e117.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373778/normal_5f9b23d0cea25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407299/normal_5fa0fd2689b36.pdfIn PDF document text
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/897445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5f87c3b29f93a.pdfIn PDF document text
    • https://jefogozadiz.weebly.com/uploads/1/3/4/0/134040800/78ab49f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://pafegum.files.wordpress.com/2020/11/xumakosokidazok.pdfIn PDF document text
    • https://watupep.files.wordpress.com/2020/11/nozaxibo.pdfIn PDF document text
    • https://givolajokofe.files.wordpress.com/2020/11/japatewajaliwififu.pdfIn PDF document text
    • https://jogamoje.files.wordpress.com/2020/11/38604794167.pdfIn PDF document text
    • https://lofunaxuroj.files.wordpress.com/2020/11/dalidil.pdfIn PDF document text
    • https://sifuwel.files.wordpress.com/2020/11/wajogixosux.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_off000060ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BA 17876 bytes
SHA-256: e4003e3ced9dd46063c73b1d5d5c2f3b80d0cfe77b5fca5d544c4457868e6380
font_01_sfnt_off00009a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A27 5740 bytes
SHA-256: 9d585ac959b603f8bdfcd45c4d6095a69b47a1ea45fdbe8a64907bb20d8807db
font_02_sfnt_off0000adaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADAF 10352 bytes
SHA-256: a7f757aac88dd9042e97644242413cd514a2b5e0c28718f6f276a5e16e118bc2
font_03_sfnt_off0000d101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD101 16144 bytes
SHA-256: fb10e5badbbf29d6a05184c763452604a6d256f7c208a2bb674868c670b14a78

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