Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b789bfb684301c6…

MALICIOUS

PDF

68.8 KB Created: 2020-10-25 05:13:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: e66fcf6256603dd00dbc29ebc4ef3777 SHA-1: 80fccc0845b84cb9a51b5a6451dff0226453ae8e SHA-256: 7b789bfb684301c6683a73d84333fb71a58f443f2c85a4a8aadce9484b7f7bef
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://cctraff.ru/strik?keyword=21+savage+red+ops In PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/gapit-galijawijekinik-kedafel.pdfIn PDF document text
    • https://fukobararusi.weebly.com/uploads/1/3/4/4/134404541/b27f9d99abae0.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/059af83888e3b6.pdfIn PDF document text
    • https://lusewixitakotaz.weebly.com/uploads/1/3/4/3/134385759/4571889.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/bufaloxad.pdfIn PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/151542.pdfIn PDF document text
    • https://jomojakadawubo.weebly.com/uploads/1/3/4/4/134448567/biwenekifiluxod.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/sesipasajomene.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/pizufusikebesar.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006be4.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006be4.bin)
    • http://www.daltonmaag.com/In extracted file (font_04_sfnt_off0000f6b5.bin)
    • https://s3.amazonaws.com/tetazino/34691873110.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/2372498566.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/27599299352.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/11228797655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4246/9526/files/tovulotajuxuximadukesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6035/3429/files/dupatazuzubutobubor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8579/1383/files/fallout_1_starting_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7631/6061/files/manual_pencil_sharpener_with_suction_bottom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1779/6247/files/16830806033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9982/2520/files/metallica_sanitarium_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5421/7388/files/hangouts_2.3_free_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3977/1802/files/98740207383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1193/4878/files/funciones_del_lenguaje_poetica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9737/5388/files/vetalanotule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9043/4456/files/download_aplikasi_v_recorder_pro_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3504/1702/files/pogomaluxexipofav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6110/7096/files/18525326678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7597/4821/files/30667522220.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 extracted file (font_00_sfnt_off00006be4.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_03_sfnt_off0000dc28.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_03_sfnt_off0000dc28.bin)

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE4 4796 bytes
SHA-256: c4199e0771d0fea666ac3089e7e548d0171c5294fe38e1dc2ae66537adbd9d3a
font_01_sfnt_off00007c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C36 22888 bytes
SHA-256: 7d6bd3da8d7f7db4ee46da8601b947ed1d2135a9e96a4e3056d02da99ec4f7b2
font_02_sfnt_off0000b4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E4 11376 bytes
SHA-256: 48ecbbb0a848d2f0086ca43dc35d685c9772802d05a8935c3d18b869f249d228
font_03_sfnt_off0000dc28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC28 17792 bytes
SHA-256: afd0a16c7db2265e54dace11a172c25b1fac50433781a13ba27eb73aac067a97
font_04_sfnt_off0000f6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2