Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1baa2f082d1c29…

MALICIOUS

PDF

81.9 KB Created: 2021-01-19 14:43:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3ca824dc047bf16979d44dc8e635e124 SHA-1: 11b1aff8b3ec029a166f16d7cbb12395042b3478 SHA-256: 2c1baa2f082d1c299200d4516edf7483859a868ee010e2f181afd3f3f5b9bf36
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/123?utm_term=connecting+networks+v6+companion+guide+pdf+download PDF link annotation
    • http://salufogi.iblogger.org/73321681601.pdfIn PDF document text
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/tukiw-kikumularaxit.pdfIn PDF document text
    • https://site-1172155.mozfiles.com/files/1172155/berovonodawajab.pdfIn PDF document text
    • https://cdn.sqhk.co/loxinesupiva/hchMgjf/the_chosen_one_season_2_netflix.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxoporerom/bgjfggo/rimurijoxozuzimuberone.pdfIn PDF document text
    • https://cdn.sqhk.co/delojiwuguj/jeujegh/22762631975.pdfIn PDF document text
    • https://rusijarumeza.weebly.com/uploads/1/3/1/8/131871651/9239531.pdfIn PDF document text
    • https://site-1171695.mozfiles.com/files/1171695/clouds_movie_disney_plus_cast.pdfIn PDF document text
    • https://site-1177689.mozfiles.com/files/1177689/taking_berberine_and_metformin_together.pdfIn PDF document text
    • https://genofegewad.weebly.com/uploads/1/3/0/7/130776157/f60be.pdfIn PDF document text
    • https://xonasuxodu.weebly.com/uploads/1/3/2/6/132681295/vipifavovawuravif.pdfIn PDF document text
    • https://site-1216774.mozfiles.com/files/1216774/jopepuzawanewer.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/fhhhUhh/music_mp3_player_free_download.pdfIn PDF document text
    • https://zubawolovef.weebly.com/uploads/1/3/4/4/134481331/vuruzuwonukaw.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
    • https://s3.amazonaws.com/henghuili-files2/27571741255.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/rupitawogegeli.pdfIn PDF document text
    • http://siwodonodefofo.epizy.com/vogonutejusuba.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/bajrang_dal_dj_audio_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/fevidadevinerem.pdfIn PDF document text
    • http://zisafaziga.epizy.com/43491358571.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_off0000f327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF327 5748 bytes
SHA-256: dd7857d1258c79127bcd1c06ef31363877669e26b4578900ae219e6e65da9ad0
font_01_sfnt_off000106bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BF 11036 bytes
SHA-256: 88222c5186609c1c6c40fcc40b3cc5cecd0015d7ba45cf4b18703720b3edf155
font_02_sfnt_off00012bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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