Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c2da33456a9e329…

MALICIOUS

PDF

68.0 KB Created: 2021-03-27 19:24:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f1d1e5a28e8d8480c3632c5c5be2855 SHA-1: 370c318a33afa9b706890b98357f98f488d7aaee SHA-256: 7c2da33456a9e329434028c076dccb4a487e53ea12acbdd5c00adc626ff18e7a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, with a specific heuristic flagging it as a 'PDF_SEO_LINK_FARM'. The primary external link identified is 'https://jottigo.ru/123?utm_term=chahat+shahrukh+khan+full+movie+hd', which is likely part of a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/123?utm_term=chahat+shahrukh+khan+full+movie+hd
    • https://lisubavami.weebly.com/uploads/1/3/4/3/134331762/jelokujumoted.pdf
    • https://cdn.sqhk.co/dutaxato/ighfogj/72266602490.pdf
    • https://cdn.sqhk.co/gusisitixinu/hH1c2Cm/doodle_alchemy_cheats_animal.pdf
    • https://mokowevabib.weebly.com/uploads/1/3/0/7/130739664/sibizitepu.pdf
    • https://cdn.sqhk.co/gepeduvo/gjghflo/space_flight_simulator_free_download_full_version.pdf
    • https://cdn.sqhk.co/wixexozesila/gvhgkpj/66147117576.pdf
    • https://gibawimeviz.weebly.com/uploads/1/3/5/3/135348906/libadelat.pdf
    • https://sexiguviwuzokal.weebly.com/uploads/1/3/4/6/134687255/zuxipo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pafexegud/62534024694.pdf
    • https://7043ee2c-bc2d-4d46-b82c-b0075177c1aa.filesusr.com/ugd/f862b5_59500ea1307c4c99a7f62179cd53e059.pdf?index=true
    • https://s3.amazonaws.com/zodawanuror/sony_hxr-nx100_full_hd_nxcam_camcorder_price.pdf
    • https://uploads.strikinglycdn.com/files/e0a02f9b-4d5a-43d5-9aaf-9c8f5aaad6c7/room_on_the_broom_book_genre.pdf
    • https://uploads.strikinglycdn.com/files/12961f48-5b27-426b-b9e7-2411609d0877/kill_team_rogue_trader_contents.pdf
    • https://uploads.strikinglycdn.com/files/b7dc9079-841a-4b1a-97bc-d5b46296cd0c/59273093181.pdf
    • https://a0a5ada1-270c-452f-b092-d943fc6f0dc0.filesusr.com/ugd/306762_cf96ff0ca66a4730ae60409af5856ecc.pdf?index=true
    • https://s3.amazonaws.com/ladojenefe/howard_miller_clock_company_address.pdf
    • https://s3.amazonaws.com/daxemo/fisica_o_que__uma_transformao_isobrica.pdf
    • https://uploads.strikinglycdn.com/files/48fe9e77-d6fe-4a78-aedc-e68824cfcbad/dell_optiplex_gx620_max_ram_speed.pdf
    • https://d668ac4b-7052-46b9-8d0c-7e282d24ced7.filesusr.com/ugd/00fc84_07818a76de63483abe156695021ff8b8.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c98f.bin
360e0110403767d9bc2eb0d7ea38a982bdb13b8fc645394cc0b301ce15b59058		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC98F 5176 bytes
font_01_sfnt_off0000db00.bin
06a831f32d7f8afcfd7729be635341220aacda4ea9b895673c761ffb2d5bc29b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB00 11708 bytes

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