Malicious PDF — malware analysis report

Static analysis result for SHA-256 1116d5182a7e9fa9…

MALICIOUS

PDF

80.7 KB Created: 2021-03-22 10:05:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8045d3bffb0b8e59e13533db286efa0 SHA-1: 50189a9e99379624281ee74fc9edb72a0acc6822 SHA-256: 1116d5182a7e9fa906a31a537df8678e92350523fb7c61cc7ab6ce3bcaf2c1f3
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a link farm. The primary URL, 'https://nipisod.ru/award?keyword=hyderabadi+biryani+recipe+pdf+download', suggests a lure related to recipe downloads. While no scripts were explicitly extracted, the PDF structure and the presence of external links indicate a phishing or redirection attempt, likely to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/award?keyword=hyderabadi+biryani+recipe+pdf+download
    • https://cdn.sqhk.co/kalusoxat/jgOcmge/dumb_ways_to_die_original_free_online.pdf
    • https://static.s123-cdn-static.com/uploads/4393911/normal_5ffc73a316a5c.pdf
    • https://cdn.sqhk.co/ferudati/9idehfQ/bilinear_and_quadratic_forms_linear_algebra.pdf
    • https://cdn-cms.f-static.net/uploads/4475728/normal_603b887fa261a.pdf
    • https://cdn.sqhk.co/mugegiduveb/jgBjhgj/kefavuvawak.pdf
    • https://cdn-cms.f-static.net/uploads/4473938/normal_60289896348a8.pdf
    • https://cdn-cms.f-static.net/uploads/4455884/normal_603f36159fda2.pdf
    • https://cdn-cms.f-static.net/uploads/4388065/normal_6012778174b2f.pdf
    • https://cdn.sqhk.co/nemazuwigumo/do4gc0C/dragon_adventure_idle_mod_apk.pdf
    • https://cdn.sqhk.co/gabixeme/ggyiaok/88211316695.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/99eefb84-d073-4be5-a5d0-8a1169b2997d/asurion_claim_affidavit_form_att.pdf
    • https://uploads.strikinglycdn.com/files/9f59fd39-1ec2-48c1-a76d-078016c36f7f/nc_drivers_license_test_online.pdf
    • https://uploads.strikinglycdn.com/files/5eb0d86f-c509-434b-a996-4b9ae86692a9/36444816775.pdf
    • https://s3.amazonaws.com/tisegovofu/kixupew.pdf
    • https://uploads.strikinglycdn.com/files/ca0109f6-2805-412d-a2e6-b22c0cade83b/differential_equations_with_boundary_value_problems_by_dennis_g_zill_8th_edition.pdf
    • https://68fdcf0a-b1f0-4758-9edf-48d2be6d990b.filesusr.com/ugd/ac51ce_0ff483785bd44386aadca646d5497fd2.pdf?index=true
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_0915a0aba94b47808d327e80847a61a7.pdf?index=true
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_0fda381709044d2f8ed569bca0d82edf.pdf?index=true
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_a8970a0bcc1e43cc9368a7cffc204202.pdf?index=true
    • https://ab60d57a-1f92-408f-9079-0b325776b613.filesusr.com/ugd/724fb5_fb618b70f71a42eaacd2d61c96be3664.pdf?index=true
    • https://bbf05351-1c49-455c-8ea8-df349977a4d5.filesusr.com/ugd/15c6d6_7504c6cc155b467cba5e230e0ae19354.pdf?index=true
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_17d07a4031af41c6ac99a7e94336b010.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b5ed80c2-e203-4224-bf41-d477b0d61660/how_to_connect_beats_solo_1_wireless_to_iphone.pdf
    • https://s3.amazonaws.com/gozilum/metal_gear_solid_v_the_phantom_pain_mission_11.pdf
    • https://s3.amazonaws.com/wupuxus/79652945972.pdf
    • 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_off0000f9c2.bin
d316d90612773159d9a15465da072a5621585fde35e00e3fdf8191dd8a547f59		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C2 5268 bytes
font_01_sfnt_off00010bd0.bin
83aba54ed11176ab56c81795cc7440db81f4d4327f621cd0baee07978c405a07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD0 11688 bytes

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