Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b5843399177920b…

MALICIOUS

PDF

73.7 KB Created: 2021-03-19 14:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 199b1d1334d469b9af6722c06907316d SHA-1: 701ec2c1f1010e3d468f2121eb7a6519690b2869 SHA-256: 6b5843399177920b75336d264b200c9cf026c3ca048d671b57bcd30823c3e27c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' and an ML classifier. It contains an embedded URI pointing to a suspicious domain, suggesting it's part of a phishing or malicious content distribution scheme. The document body, though heavily obfuscated, contains keywords related to the embedded URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/wix?keyword=gettube+apk+full
    • https://gibejeki.weebly.com/uploads/1/3/1/4/131438187/zebukeluk.pdf
    • https://cdn-cms.f-static.net/uploads/4465015/normal_6015c56f9402a.pdf
    • https://barurusijibipek.weebly.com/uploads/1/3/0/7/130740419/girig.pdf
    • https://static.s123-cdn-static.com/uploads/4367308/normal_5fe3f173dfa09.pdf
    • https://badosesidexezub.weebly.com/uploads/1/3/0/8/130874160/nobiguvigogotogabego.pdf
    • http://fullstacket.online/how_do_i_get_my_command_bar_back_in_autocada4eq8.pdf
    • http://sentytld.online/xexatem5lpd6.pdf
    • https://cdn-cms.f-static.net/uploads/4482418/normal_603158a5b0091.pdf
    • https://cdn-cms.f-static.net/uploads/4462345/normal_601f376a86a65.pdf
    • http://sell-toclick.online/litimutanilizaloginlwz0.pdf
    • http://reduslim-italiaoficial.site/lazatevulakcj9ji.pdf
    • https://cdn-cms.f-static.net/uploads/4413718/normal_603db44cca72f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a63105c6-92e4-43cc-86f5-8292dff13ac3/how_much_does_a_digital_marketing_assistant_make.pdf
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_1ca0246c23a64f42886841536f712688.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6b80a875-7ae6-4e33-8fa7-18866d4680ec/gibatuw.pdf
    • https://uploads.strikinglycdn.com/files/ee3e976b-ec93-48da-8287-cfd855b653e9/44784807247.pdf
    • https://uploads.strikinglycdn.com/files/0586ccb0-4497-414a-881b-f96452beb457/83537361061.pdf
    • https://uploads.strikinglycdn.com/files/2f871ba6-8462-4b2c-9652-81552e945b94/58671705340.pdf
    • https://7fad2989-91b8-457c-89bc-9a0e7aeef19f.filesusr.com/ugd/b03ff3_42cf00e8a795434786ef9cd4f4c33b4f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1ddaeb13-078c-4027-bc1b-d850d92fb0b8/sports_hd_dv_1080p_h.264_manual.pdf
    • https://uploads.strikinglycdn.com/files/4f96543e-b72e-4035-8534-6b9ad3074d28/48521819118.pdf
    • https://5984e891-aecd-43e6-866f-efdb297c9c35.filesusr.com/ugd/403565_bc5158ce1b5b4c7d808a1dbd16adbb97.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1d0ccd66-4d0b-4641-9101-d8073227000a/65019331752.pdf
    • https://uploads.strikinglycdn.com/files/de501cce-1b4c-4ff1-abe0-f5e592de822a/7259850661.pdf
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_ba4fe3e8084b4c588c223dc0215f002e.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_off0000e446.bin
2b411fd7c9039f06f3cd0d37ef204fe61472d0c6d643b62deb640948a53df9df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE446 4856 bytes
font_01_sfnt_off0000f4ef.bin
d9b7303c79d041494211238a54efd881c69c9f982dad83d07037ca2aa47e3a08		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EF 11228 bytes

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