Malicious PDF — malware analysis report

Static analysis result for SHA-256 42ab83abd6549756…

MALICIOUS

PDF

75.4 KB Created: 2021-01-23 10:56:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 33bd8981447a19e671b9101103f3c9d8 SHA-1: 71c463b21c7fde7fba1b4c849ac80e4bf659ef35 SHA-256: 42ab83abd6549756579e0aa9b5945b87981342cdaf36ab430a5a5a19e6fa0828
96 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, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick the user into navigating to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/123?utm_term=insignia+roku+tv+error+code+014.40 PDF link annotation
    • https://site-1174390.mozfiles.com/files/1174390/94790526006.pdfIn PDF document text
    • https://site-1168136.mozfiles.com/files/1168136/movie_maker_for_youtube_and_instagram_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/guposidum/j2Tjaja/microban_24_sanitizing_spray_citrus_scent.pdfIn PDF document text
    • https://cdn.sqhk.co/lamajemomu/jahcjgq/minecraft_godzilla_mod_1._7._10_curseforge.pdfIn PDF document text
    • https://cdn.sqhk.co/dedenijikal/hi0jiq4/lugibukajegusojafofuze.pdfIn PDF document text
    • https://site-1167953.mozfiles.com/files/1167953/black_wolf_eyes_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/rmiiVid/butuvowugawozes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366956/normal_5fed65e923cd3.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/jagdMmv/boku_payment_online_casino.pdfIn PDF document text
    • https://cdn.sqhk.co/sejejajoxej/gckzttD/farkle_minkus_girlfriend.pdfIn PDF document text
    • https://cdn.sqhk.co/simunenij/d5Lihji/gugaras.pdfIn PDF document text
    • https://cdn.sqhk.co/joxipadij/ihhL8gi/espn_chicago_bulls_depth_chart.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/air_force_airman_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/free_excel_test_for_interview.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/endorsement_letter_format_in_word.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/63547019425.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/18176335849.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/crystal_report_using_dataset_in_c._net.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/42747975282.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE865 5452 bytes
SHA-256: f2c8823ac04809c0b29a7a4bfc3bcb09f5bb84706687756a6ea8259bfe259476
font_01_sfnt_off0000fb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB13 10760 bytes
SHA-256: 64a51fd363a0c3eb610e1afb9b263a286a145dedd9bfeb872faddfec2073204a

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