Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02140891049a2a1…

MALICIOUS

PDF

43.7 KB Created: 2020-10-17 05:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4c9c7a241f340f53f836131ac42ea755 SHA-1: 7e491ead7772914317fb588c3bb1167df2ceca54 SHA-256: b02140891049a2a1dcdc89ee51161a585b02fc88777971bd3632c27af07de84b
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.club/123?keyword=ecology+practice+worksheet+answers In PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/rutiziz_muzub_gawek_vumolumapelot.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/1d44b872.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/7037580.pdfIn PDF document text
    • https://putojedenavaxo.weebly.com/uploads/1/3/2/6/132683165/gevozariwuruw-ruzoxenisoba-nekugagujegam-lisotul.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/jodofalem.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279037.pdfIn PDF document text
    • https://pituluwo.weebly.com/uploads/1/3/1/4/131437949/4731153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_5f89a529ad85e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369768/normal_5f8995bb3783e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369168/normal_5f87aef6e5ebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f871ba09c2e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376610/normal_5f8a4ffabcff7.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/bufozekuzodi.pdfIn PDF document text
    • https://godadonalizubo.weebly.com/uploads/1/3/1/4/131437317/gumarupiratif.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/1/0500/3028/0864/files/13627414531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8657/5771/files/5356927982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/3783/6710/files/zumojevexisuwafifarawuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4200/4375/files/kewuxelikuriku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/26653388109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0224/7838/files/toussaint_louverture_letter_to_the_directory.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D70 5408 bytes
SHA-256: 6ad68be34e65a20d5c332c88a6407ffcd673a3b00da64288e3f34e9fe93e6890
font_01_sfnt_off00007fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE6 9816 bytes
SHA-256: 6c588e8eea13989d1d6b749dd709ee9fc0ebf838e19bcbaf14c1fd486f03a959

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