Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee49c149747c7c0…

MALICIOUS

PDF

91.4 KB Created: 2021-03-10 10:02:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 58bc83efbc59c7748034b47879c5b8c3 SHA-1: 2cfbd6291d35c27236b5b8cba3d9ad575ada7bd4 SHA-256: 5ee49c149747c7c0a509d48d423c0c3b44da29565a7f233f3a34bcb7787235cf
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of a URL with a 'utm_term' parameter indicates a potential phishing or redirection attempt. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://midufefew.ru/aws?utm_term=return+of+service+meaning+in+hindi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465151/normal_602b794f51f4a.pdfIn PDF document text
    • https://cdn.sqhk.co/punenekebi/bqhiieN/xamasaxalonoseletofigiwid.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/LLsgeRz/star_wars_clone_wars_ahsoka_age.pdfIn PDF document text
    • https://cdn.sqhk.co/juwafajem/jjAKoKH/kakiri.pdfIn PDF document text
    • https://cdn.sqhk.co/dawiredi/Cc3ifpa/bubble_witch_game_free_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/detatakev/iicTAgj/virtual_dj_air_horn_sound_effect.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465905/normal_5fd9de53a1d83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490534/normal_6026ce485c0e6.pdfIn PDF document text
    • https://cdn.sqhk.co/rijunawep/AidBAAs/final_fantasy_7_walkthrough_don_s_mansion.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/hjehcmf/3789559127.pdfIn PDF document text
    • https://cdn.sqhk.co/wujamufaw/haMMTQg/kineferujaru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/70790364139.pdfIn PDF document text
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_7eb7b8f2dcbd4620903cb46b198ea779.pdf?index=trueIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_d768a6e4b5f84a24bf36e9d5fa6406e0.pdf?index=trueIn PDF document text
    • https://9c50f6df-e9c1-453e-a208-eff1cefe231f.filesusr.com/ugd/44b3dc_e91827e01dfd481381bdefc086478ffe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toguvaju/family_tree_template_ppt.pdfIn PDF document text
    • https://1c437d0a-cccb-4a8a-93f1-39e0b5126915.filesusr.com/ugd/b91566_a22f9ccc094f4fa7b6186522a3df08a3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/quantity_of_heat_questions_and_answers.pdfIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_da47f9d4a1b24871b7abdaa1a997df9b.pdf?index=trueIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_fc70159841ef4df2a063565b3e9b7899.pdf?index=trueIn PDF document text
    • https://4b3b4da4-1145-40fd-8a04-0ac29766dab0.filesusr.com/ugd/6c6203_e23db732432248f3a887364577fac1ac.pdf?index=trueIn PDF document text
    • https://57933e30-1e86-4cbe-ad2b-777cb72f9932.filesusr.com/ugd/235f1a_9ffc019c7d854b09a865bdf3102f6561.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/scholl_compression_tights_size_guide.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 PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6E 5472 bytes
SHA-256: 72e964bca486e9c98042b57ca4832fd393b49a3bd3dbacc0984a1d95b987a658
font_01_sfnt_off00010ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE5 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off00011a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A48 11172 bytes
SHA-256: 8988870dd2b74d2786a5d84dcfa5458c3ddc2e2c9eaa47181b6c9786c153aba3
font_03_sfnt_off000140c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140C1 9476 bytes
SHA-256: f703bf39bcbb50aaa0d56b2bc8ba58d143c84c8d6d9c18ac163fceb5d4ee912f

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