Malicious PDF — malware analysis report

Static analysis result for SHA-256 7148072ed0961151…

MALICIOUS

PDF

74.1 KB Created: 2021-03-06 22:13:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc26bdce67cfbc8e292c2df759ff1c6e SHA-1: 660ae8bf6e933b0edfa9a726d89852db2f325c76 SHA-256: 7148072ed0961151461bb2a1ec5658e558a6ccb8df9310579910d4af06878e2e
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically related to phishing. The embedded URLs suggest an attempt to redirect users to potentially harmful content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/wix?keyword=dragonvale+world+apk+hack
    • http://vitofemegawe.getenjoyment.net/quran_online_without_translation_english.pdf
    • https://cdn.sqhk.co/dosijowikul/hcejapj/island_defense_offline_tower_defense_mod_apk.pdf
    • https://cdn.sqhk.co/gobisofokox/6jf9Pjj/776304914.pdf
    • http://wogivodugakovek.mygamesonline.org/xipivorozekufegotuli.pdf
    • http://kazexajisodibu.medianewsonline.com/does_disney_plus_have_a_samsung_tv_app.pdf
    • http://jaralet.getenjoyment.net/3578579700.pdf
    • https://cdn.sqhk.co/vujenibolo/heEf9ib/top_piano_lessons_near_me.pdf
    • https://cdn.sqhk.co/kapudome/hiEiggi/70181053167.pdf
    • http://zujejilolo.scienceontheweb.net/darut.pdf
    • https://cdn.sqhk.co/purawewus/mRhfiiV/free_2_player_games_playstation_store.pdf
    • https://cdn.sqhk.co/tememukafosu/ja6jb3f/kodud.pdf
    • http://veselutut.mywebcommunity.org/62665782118.pdf
    • https://cdn.sqhk.co/gebunemif/DY6icij/accident_formula_2_youtube.pdf
    • http://tiluvopira.medianewsonline.com/broadstone_air_mattress_twin.pdf
    • https://cdn.sqhk.co/bajipugotox/b7hfwzp/43402514266.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fejakixoweka/63346984283.pdf
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_f445845f5177476b9fdac61daf8333c2.pdf?index=true
    • https://s3.amazonaws.com/matogapibelifiv/58567685619.pdf
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_cca1d8d6796449ba96cdd52c2385c3b4.pdf?index=true
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_1206582e4e5241d98536fc88e26a64d0.pdf?index=true
    • https://7e073981-ad1c-4081-8dc0-76946ba36063.filesusr.com/ugd/c4f63d_0bfa0b9cce3d4c2f88f18413f70f0e03.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_off0000e39b.bin
6e450459df037a5588ff3c039ce12a701bb04ba2fa91657e96b79ff517a8f019		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE39B 5372 bytes
font_01_sfnt_off0000f5fa.bin
7a1b64ea3de7f340f9ac5840aaee23e764cc6c2562eacabaccd38f83ebd30863		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FA 11340 bytes

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