Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cb278a0f17be0ec…

MALICIOUS

PDF

86.9 KB Created: 2021-04-04 01:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 401bc1d157cc674efbf41f5b9007b9de SHA-1: 77f318611a10678224de38db2334513a6697c752 SHA-256: 6cb278a0f17be0ecf3f7d5f2da2fa2f2a869f9aaddc51be597833e1feab19cc6
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that redirects to a suspicious domain, likely intended to host further malicious content or phishing pages. The document body, though heavily obfuscated, appears to be a lure related to essay writing, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/strik?utm_term=how+to+write+an+evaluation+essay+psychology
    • http://reduslimitaly-ufficiale.site/study_island_answers_math_7th_gradell8mn.pdf
    • http://redit.fun/borland_c_5._02_free_32_bitjtm9n.pdf
    • https://tuxutumixebapi.weebly.com/uploads/1/3/1/4/131438514/2483540.pdf
    • http://dlkmvkoenv.info/someone_like_you_piano_notes_right_hand3ndnn.pdf
    • http://mrshadow.net/16406259314nfk2w.pdf
    • https://static.s123-cdn-static.com/uploads/4417033/normal_5feb921e98f7a.pdf
    • https://watagejikifawup.weebly.com/uploads/1/3/4/5/134589749/3198354.pdf
    • https://nozubewow.weebly.com/uploads/1/3/1/1/131164313/banaxugofebaz_falikefak_lapavosi_lotikipewika.pdf
    • https://nazafusi.weebly.com/uploads/1/3/5/2/135297870/2531c.pdf
    • https://cdn-cms.f-static.net/uploads/4465694/normal_60617f9171a19.pdf
    • https://situtewazugigev.weebly.com/uploads/1/3/4/2/134265876/1716949.pdf
    • http://furniture21.online/stainless_steel_sheet_gauge_tolerance8zafq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/muwemivumazulax/can_t_stop_the_feeling_ringtone_android.pdf
    • https://s3.amazonaws.com/xonaxevetaf/chakram_movie_songs_lyrics.pdf
    • https://s3.amazonaws.com/sefiwegegagu/41702648297.pdf
    • https://uploads.strikinglycdn.com/files/08215abe-153d-4323-bc16-b3f00854a2fe/gre_india_test_dates.pdf
    • http://diruben.rf.gd/pixefos.pdf
    • http://kiluxelatax.epizy.com/gadep.pdf
    • https://s3.amazonaws.com/mozirolinitaje/amplified_study_bible_free_for_pc.pdf
    • http://vaxuxosubize.epizy.com/rajedugajipefipo.pdf
    • http://pogapebod.rf.gd/embedded_video_from_website_online.pdf
    • https://uploads.strikinglycdn.com/files/84268d70-9f64-4d4b-ace2-3082c72afa16/sodastream_instructions_2020.pdf
    • https://s3.amazonaws.com/fupanabivote/wuvifutozali.pdf
    • https://uploads.strikinglycdn.com/files/2f1ed263-0113-4459-9c71-169b0f3dcd5a/stihl_weed_eater_head_wont_stop_spinning.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001164a.bin
51bfba54deb26f806e8f4e759814c82cf2724fb0523a0730e2562c681d3de757		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1164A 5408 bytes
font_01_sfnt_off000128c2.bin
c4125a1352d5a80f021eef54c3e773b7361340bccfde2270f51e4a522e4620ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128C2 11052 bytes

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