Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1bd16975e30d1c7…

MALICIOUS

PDF

45.3 KB Created: 2020-10-25 21:20:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 89dfc83c62361a813688a5f036e72178 SHA-1: 086e555d6bc82689ed30330a08baa1833102477b SHA-256: d1bd16975e30d1c75e43419ba182a71303470c84092b562eedf6fd2256a057c3
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://cctraff.ru/aws?keyword=auditors+report+notes+pdf In PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/1020438.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/03103613c.pdfIn PDF document text
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/namatemilomovab.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/4029177.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/6883937.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000755e.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000755e.bin)
    • https://cdn.shopify.com/s/files/1/0496/8978/8572/files/gebesilufed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7286/3907/files/download_nds_emulator_apk_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7297/8585/files/mcculloch_3200_chainsaw_specs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1306/3335/files/volkswagen_touran_2020_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0500/3934/files/rokawakaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1503/5288/files/everstart_basic_six_dual_rate_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/6089/8213/files/free_download_scribd_app_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2854/7237/files/download_struckd_3d_game_creator_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/8997/1350/files/talaveloxan.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/assembly_language_8086_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/lose_fat_gain_muscle_diet_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/61141904601.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/lurinop.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/building_engineering_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9690/6174/files/liftarens_guide_till_galaxen_del_1-5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1980/3034/files/zutikoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4155/3046/files/contoh_proposal_penelitian_kualitatif_lengkap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/6249/8754/files/zemurezasew.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_off0000755e.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000755e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x755E 4780 bytes
SHA-256: 991f21742c0c4c361be50d851b984363d56081917e9849f72fe2b181045a93ef
font_01_sfnt_off000085b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85B2 10056 bytes
SHA-256: fe9de227d59ddc1d688f524a9df3501409b0c7521b13d41617c403554bdb7b20