Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d2a3f14c8d7e07c…

MALICIOUS

PDF

62.9 KB Created: 2020-10-07 19:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bca78d677b5da1ad3cff4fbeb5cb66b6 SHA-1: aa7f813174e35845420b0bbafd956e68050e609d SHA-256: 8d2a3f14c8d7e07ce99cdc8c1a0a3a8f94e878ca11b0cc8eb7569bd137254a1c
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://ggtraff.ru/strik?keyword=malayalam+funny+questions In PDF document text
    • http://files.littlestarzpreschool.com/uploads/1/3/0/7/130776200/dozobamutu-sosobubigig.pdfIn PDF document text
    • http://lekozadaw.susannsuprenant.com/uploads/1/3/1/8/131857544/pexomitudabenevi.pdfIn PDF document text
    • http://files.losalcouncil.com/uploads/1/3/2/7/132712323/5779752.pdfIn PDF document text
    • http://jogin.iammamastories.com/uploads/1/3/1/4/131453449/takowedoripemarolo.pdfIn PDF document text
    • http://files.t2softball.com/uploads/1/3/1/1/131164248/8e879.pdfIn PDF document text
    • https://site-1037184.mozfiles.com/files/1037184/berabakepesemebatigitu.pdfIn PDF document text
    • https://site-1036911.mozfiles.com/files/1036911/nojasanibilapox.pdfIn PDF document text
    • https://site-1038780.mozfiles.com/files/1038780/61679749980.pdfIn PDF document text
    • https://site-1036880.mozfiles.com/files/1036880/35650327924.pdfIn PDF document text
    • https://site-1039749.mozfiles.com/files/1039749/5482581870.pdfIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn 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://uploads.strikinglycdn.com/files/0160d01b-bddb-4f38-afa7-d3afb4445965/dojugudesodowelowul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/103ffb47-417b-4976-b69f-c475bcfaffaf/jivifidomopufejepotepuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a03da131-d67d-4240-ac17-68ac59519aa2/81519985045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5882/6916/files/97025165781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7232/9630/files/types_of_bacon_cut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0504/5659/files/mulejomovujan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8855/9782/files/dufetakolilopewodixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2403/4203/files/les_stroud_arctic_knife.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00007b8f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7B8F 18776 bytes
SHA-256: e43e8729070d1551b94034f3e95b1905baed3024f34647522f37a89770678fb1
font_00_sfnt_off00006acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACD 4932 bytes
SHA-256: cc463fc887a72f7cfad6d2e4c6e0b2bc205de3c219e305d1b6b39464b7d386d7
font_02_sfnt_off0000b4c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C7 12976 bytes
SHA-256: fe3d43209fc6ced2c3c13192d059aced95177bb012c5606179a8ca5a81692239
font_03_sfnt_off0000ddf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e