Malicious PDF — malware analysis report

Static analysis result for SHA-256 7531de93fa0f6646…

MALICIOUS

PDF

279.9 KB Created: 2021-03-31 11:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: fa135689cb356f01dde99512a54f54a3 SHA-1: 8a8f9f35d9e8e3794844081ee7959a76a8dcfecc SHA-256: 7531de93fa0f6646a0f1c11b6dd4cbb7b897c006fef6a3736f742eba82d5d03e
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that masquerades as a reference guide, likely intended to trick the user into visiting a malicious site for further compromise. No scripts were extracted, but the presence of an external URI and the ML/ClamAV detections strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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://nipisod.ru/wix?keyword=tung+acupuncture+quick+reference+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450641/normal_5fc95b57872c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_606066a22a59e.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/jeoidhd/autocad_dwg_viewer_editor_free.pdfIn PDF document text
    • https://vigajinid.weebly.com/uploads/1/3/4/8/134889024/kiremopabalen_tewetuzigo_buzuzom_xidewedewetume.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_601bcd1cc29af.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/cmhjhe7/4_pics_1_word_7_letters_leaf_butterfly.pdfIn PDF document text
    • https://cdn.sqhk.co/kuniremolu/hflhdic/menej.pdfIn PDF document text
    • https://lexikujufuwu.weebly.com/uploads/1/3/4/6/134613894/4424100.pdfIn PDF document text
    • https://didegesub.weebly.com/uploads/1/3/2/6/132681352/taxegadaduwu_misux_garobonoze_rureki.pdfIn PDF document text
    • http://kovokowem.iblogger.org/168._excel_sheet_column_title_python.pdfIn PDF document text
    • https://cdn.sqhk.co/wifukatar/b3G6Wjj/52441715778.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425209/normal_60363a328c999.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489263/normal_6048a509da148.pdfIn PDF document text
    • http://kaloveximi.iblogger.org/dejiluxupan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://piwefijegiv.epizy.com/31567875467.pdfIn PDF document text
    • http://zenifipepodu.rf.gd/csgo_survival_knife_fade_seed.pdfIn PDF document text
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_090cf84f01114939b6b07a646346818f.pdf?index=trueIn PDF document text
    • http://nozasunagon.epizy.com/plane_simulator_2018.pdfIn PDF document text
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_a6a827b60b3b4578b307adfb55693213.pdf?index=trueIn PDF document text
    • http://radikabo.rf.gd/kafka_tutorialspoint.pdfIn PDF document text
    • https://d787a32c-196b-4e99-9c98-3ae3c28023f9.filesusr.com/ugd/05b469_9227a1f959de41c8baa4a852a4e29bc8.pdf?index=trueIn PDF document text
    • http://zarazemudaseri.epizy.com/aagadu_movie_3gp_video_songs.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_off0002da0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DA0B 106252 bytes
SHA-256: 5f132d3d71f8302dbfcc1e287989acb63f776e6ee52ce814d4a1d30d312c4196
font_01_sfnt_off00041268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41268 5252 bytes
SHA-256: 659c7e3181410d1d46483067736267728c33c10ed1328be3915e0d8b7a9d9c95
font_02_sfnt_off0004245d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4245D 15964 bytes
SHA-256: 6127df2d1ec46ac859d40fa5e864cd2c9427d009404b38b1205a6bceffbb2d2f

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