Malicious PDF — malware analysis report

Static analysis result for SHA-256 91a3a7e2127b6f5c…

MALICIOUS

PDF

75.5 KB Created: 2021-03-23 06:22:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 0e188e36c11d6cd86d5468980d3f7adc SHA-1: 5bc5930e46233f5249f9dccdf10901b8279941bc SHA-256: 91a3a7e2127b6f5cf7065af530b05414b0377b771285a5f043179cadf1047d93
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a phishing site. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URI.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • 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://baarspo.ru/wix?keyword=joseph+j+catena PDF link annotation
    • https://cdn.sqhk.co/dikarulik/haOOhdq/3726081079.pdfIn PDF document text
    • http://jekebes.iblogger.org/sijakitux.pdfIn PDF document text
    • https://cdn.sqhk.co/burexewejam/dMigifa/mameborifonadonasuj.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/ihjbMjb/93067259083.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/0L0dwgi/dokadoxofiganegadomo.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/ljg3shf/age_of_anxiety_european_history.pdfIn PDF document text
    • https://cdn.sqhk.co/bimonabozo/fhdhhkE/39899718819.pdfIn PDF document text
    • https://cdn.sqhk.co/wukatigubo/eFidgeF/22375749711.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/930043d2-acf3-45c9-ae52-36c9ec5fbf80/what_is_the_disease_als.pdfIn PDF document text
    • http://pulilidason.epizy.com/couple_cartoon_pictures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3340a74c-897d-4c20-b83b-8ab15c1b658c/fukozor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df8af468-6ff2-479d-857a-ccb3525d71bc/what_is_the_most_accurate_bible_translation_jeopardy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8de9b8f7-05fd-4116-ae2f-ca7e07ff5003/8938773383.pdfIn PDF document text
    • http://komadolosa.rf.gd/piwax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e78ce603-256d-467a-9bf3-50602d185921/15668496757.pdfIn PDF document text
    • http://danasavej.epizy.com/fixasimudibar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0954349d-a4c6-4ec5-9e28-a8e6f2980c24/46664307172.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d94e3c4-9a0e-4759-b0c5-4b7552faf6a9/dikunugelewibifu.pdfIn PDF document text
    • http://visobiwedixupip.rf.gd/the_diamond_sutra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/574eac92-36b1-4f71-ac22-fc7ee4bf6472/rejikoseruloveberas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3747b539-0958-4b03-8634-90df52b3d8e8/maths_formulas_upto_10th_class.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f94ad1e7-a21d-43eb-9b96-70a90b4b3a61/dante_purgatory_canto_1_summary.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD981 4696 bytes
SHA-256: 9d4bb6cbd56954572817b11d184199f4d4f3ddd820ef151c681f4ca31e85ec36
font_01_sfnt_off0000e975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE975 11520 bytes
SHA-256: 55c5e54e71c3837084ce8030428223374f0657afbd3195045c1091216d1eaffa
font_02_sfnt_off000110e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E4 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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