Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2b653e8cfd2dfbc…

MALICIOUS

PDF

101.0 KB Created: 2020-10-28 07:17:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: ed512b7816ed17a154e36e71a651266a SHA-1: e35685dbec40b85bd3506628c75c8b989904bdc6 SHA-256: a2b653e8cfd2dfbca62ddc63c508528536066191ce28b4906694bb34bd64fb0d
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/pify?keyword=7+phases+of+uw In PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/kizerapu.pdfIn PDF document text
    • https://bakuwosir.weebly.com/uploads/1/3/0/8/130874569/e4952c5c91.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/velowo_dakemolaku.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/sikimiwo.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/1302795.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/butalusagu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_5f88472a1a6eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373776/normal_5f8ad2a566dd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377935/normal_5f9340f33ebf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5f91ef864dc9b.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/1/0500/2382/5578/files/psx_emulator_apk_coolrom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/5664/0412/files/76311425023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2294/2871/files/gre_essay_good_score.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8427/6415/files/lekofemex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7336/2852/files/mekofabogeduri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4522/2550/files/ethicon_harmonic_scalpel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9773/5843/files/75638999041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b62b4a6c-c7c1-48be-a5e8-9029606428f4/47392378492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/709b4fd1-acc0-4950-b098-2e3a955c93ec/96329252878.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00015811.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15811 25640 bytes
SHA-256: 63ce6198b686c6dbd8a88db6e2f60119e6f3cb6c516551578a4fde449d576f12
font_00_sfnt_off00012031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12031 4940 bytes
SHA-256: 0a0e065d7d5e44e67c17922b5166b20e5d71d46904860c22d4cfc1170e11e1b7
font_01_sfnt_off00013115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13115 11328 bytes
SHA-256: 50d4ee41f23ce339ec4859cec648928e08062d30b9c9440da3cbf43862c121c4