Malicious PDF — malware analysis report

Static analysis result for SHA-256 dca21a4c7156d100…

MALICIOUS

PDF

85.3 KB Created: 2021-03-15 03:49:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39db052ed353e2698972b925d4d970af SHA-1: 1bdb411dcb89d300abbf6fde5f6a7c2e142ac210 SHA-256: dca21a4c7156d1001a8fb2a6494e911c9fed1e9fe850ef829e7b86294876886c
116 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing. The embedded URL likely leads to a malicious payload or further phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://xezojetit.ru/award?keyword=arbaciin+nawawi+pdf
    • https://cdn-cms.f-static.net/uploads/4461523/normal_603c836dc3bd4.pdf
    • https://biwawabagukolaz.weebly.com/uploads/1/3/4/7/134730268/aceeaffcc40.pdf
    • https://cdn.sqhk.co/tajudozizif/g4jdqq6/retro_bike_speedometer.pdf
    • https://cdn.sqhk.co/gituridewo/MvggSjj/reading_skills_worksheets_4th_grade.pdf
    • https://kozuliwibiji.weebly.com/uploads/1/3/4/7/134705154/c125ee45a2.pdf
    • https://cdn.sqhk.co/jirowolad/lpifgjK/40274117670.pdf
    • https://cdn.sqhk.co/sogefuluf/xqKjfZn/22496515300.pdf
    • https://static.s123-cdn-static.com/uploads/4446390/normal_5fecfa52a14a7.pdf
    • https://dawifibikinofi.weebly.com/uploads/1/3/4/6/134682228/vekovubem.pdf
    • https://static.s123-cdn-static.com/uploads/4495399/normal_5fcf6fe36035a.pdf
    • https://static.s123-cdn-static.com/uploads/4424953/normal_5fe2a627ee83a.pdf
    • https://cdn.sqhk.co/tijinujul/Vrygige/best_love_ringtones_2018_free_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0cfb7793-10e0-47a0-bee6-657f4690e6f3/rosemarys_baby_serie_streaming_ita.pdf
    • http://wepinipinalojud.epizy.com/51611413331.pdf
    • https://uploads.strikinglycdn.com/files/cc8c4692-715f-4268-b62d-c571a67203c6/25799794725.pdf
    • https://083189c9-8220-4687-a375-57be19a37228.filesusr.com/ugd/909b15_a52dee8891734bdbb0bbc8ff06e64132.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6af04b01-2423-4e99-ac0b-f9e50ab0d230/what_does_the_scripture_say_about_divorce.pdf
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_7276012d1abe488584d1e06724c203cc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7aeca6e6-02ec-4e50-a8d5-7491e49d99cd/mefotixetunijonub.pdf
    • https://uploads.strikinglycdn.com/files/f95da9be-e693-4a5d-93fd-d4c5bdb13da5/dyson_big_ball_multi_floor_vacuum_cleaner_reviews.pdf
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_9fa8d4ac3172426aba8f6890af3b0b59.pdf?index=true
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_9dfc1442d08449be828d610f77b3b9de.pdf?index=true
    • http://xutenodopo.rf.gd/english_speaking_for_beginners_download_free.pdf
    • http://pepabalexesoge.rf.gd/crippen_sheet_metal_inc.pdf
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_d44deab0b1944a6898448ce24babcf66.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_off00010e80.bin
039befe3f044a955677ded5b0a2324d50305a309c8fba655983afee1838cf3f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E80 5160 bytes
font_01_sfnt_off0001202e.bin
b4be5c5eb24c5a4220f38952a9ddbf292ce56273602999c92e78ebe7e3b9affe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1202E 11600 bytes

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