Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dafad888721af35…

MALICIOUS

PDF

81.2 KB Created: 2021-03-09 11:04:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1589eeeb55167b614cd65110e016e88c SHA-1: 11e946436a15d394f53e29868e01230d6e1b452d SHA-256: 2dafad888721af35f175030148052fbb11686fef6414a849e7e1fb39ece89a84
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF document that contains an embedded URL, identified as a lure for phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a deceptive lure related to a refrigerator manual, aiming to trick users into clicking the malicious link.

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://midufefew.ru/wix?keyword=manual+for+lg+refrigerator PDF link annotation
    • http://kokilubowo.22web.org/poulan_pro_chainsaw_chain_brake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371807/normal_602eaf9d832f0.pdfIn PDF document text
    • http://livunopewopo.iblogger.org/fenumozeb.pdfIn PDF document text
    • http://pixell.store/tantra_chair_position_guidenotdv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465941/normal_5fd8b3df673bd.pdfIn PDF document text
    • http://barodowo.iblogger.org/6205418217.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383475/normal_5ffdb22c3791e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470972/normal_6018ee1beede4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479223/normal_601edac432135.pdfIn PDF document text
    • http://hesap-al-sat.com/632207490901z2m0.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/naxozelozude/veal_sweetbreads_nutritional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/christmas_video_songs_tamil_free.pdfIn PDF document text
    • https://2c5a832e-93c4-4ab0-bef0-969ef348d747.filesusr.com/ugd/cc5daa_9d3cd00a520d445bac7bace3401f4eaa.pdf?index=trueIn PDF document text
    • http://bamoxopigodarok.epizy.com/cuisinart_powerprep_plus_14_cup_food_processor_manual.pdfIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_476c88a2f1ea45b986930f5adeaf5367.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/laboli.pdfIn PDF document text
    • http://tavupovasar.rf.gd/does_strongman_training_build_muscle.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/muleniradezigizaz.pdfIn PDF document text
    • http://sunemixawuvija.epizy.com/bulebanojezivove.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/unbreakable_movie_720p.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_off000103a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A6 4760 bytes
SHA-256: 7f5b404a09adda5ebb88efc8a1b90e21199e25832b78f25bfded9a3b13893e1c
font_01_sfnt_off000113f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F7 10460 bytes
SHA-256: a69cfa9077fb9de37d8f6e1b8236b315594819a0f7188505203bab22b2266e63

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