Malicious PDF — malware analysis report

Static analysis result for SHA-256 d760f6f7814e3f76…

MALICIOUS

PDF

75.7 KB Created: 2021-02-13 18:43:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2d6573e4ee84847d4d679b3f75e1af97 SHA-1: a9bd2712b104e09bd88c86b1a1f04b3e938c2d86 SHA-256: d760f6f7814e3f76c837bf286203d621a38f7aa01634bf09fb5c74a23f539ef9
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The embedded URL points to a suspicious domain, likely serving a malicious payload disguised as a software download. No scripts were extracted, but the PDF structure and external URL suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/123?utm_term=java+se8+for+programmers+3rd+edition+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458404/normal_600b9e5385446.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388426/normal_5fcdaab8b1566.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401972/normal_5ff40d2c37d32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445731/normal_6023e6918cdbf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419410/normal_6002b6c0e8967.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366341/normal_5ff938009e01b.pdfIn PDF document text
    • http://givepamodugag.22web.org/42525948199.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476285/normal_601dbb69e600c.pdfIn PDF document text
    • http://puviwaxeraw.22web.org/3ds_emulator_for_pc_32_bit.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
    • http://zoribele.epizy.com/1271849591.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/codycross_planet_earth_puzzle_4_answers.pdfIn PDF document text
    • http://vejesigivilowen.rf.gd/java_for_windows_10_filehippo.pdfIn PDF document text
    • http://zapudeni.epizy.com/because_i_got_high_full_song.pdfIn PDF document text
    • http://kamiwivexa.epizy.com/android_tablet_10_inch_16gb.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/word_meaning_book.pdfIn PDF document text
    • http://mutexuwe.epizy.com/dubadu.pdfIn PDF document text
    • http://favirivesez.epizy.com/chhath_puja_song_full_hd_video.pdfIn PDF document text
    • http://gatokelemek.rf.gd/pevibekim.pdfIn PDF document text
    • http://zivobojunoloma.epizy.com/27295913466.pdfIn PDF document text
    • http://garuwefusu.epizy.com/38830613019.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_off0000dc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0D 5524 bytes
SHA-256: 0ee9a34b29a19e3c7e718ea64e14bd0732937a22ed7107ef951a4d58e1d88862
font_01_sfnt_off0000eec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC1 10760 bytes
SHA-256: b71f2f799fc8d2ff9f81a7d57e1a41fe3a50590c52a08180e1263f04974cc4f3
font_02_sfnt_off0001139f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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