Malicious PDF — malware analysis report

Static analysis result for SHA-256 20154fb10eecb5c0…

MALICIOUS

PDF

95.8 KB Created: 2021-03-18 10:59:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 721b7bcd961bfbe7ebe9682554000e9c SHA-1: 4fdf8661e459704e6f0aa2bca12ed55a339d765d SHA-256: 20154fb10eecb5c06255800ef4859b0fddc5b5eae3c8ac560c18b50195633126
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/wix?keyword=on+the+map+wheel+of+fortune+1+word
    • https://cdn.sqhk.co/repipedifavi/OZibvMu/zig_zag_rolling_machine_adjustment.pdf
    • http://zikapipumimapo.22web.org/lasapufifidemab.pdf
    • http://love-cosmetics.shop/introduction_to_probability_and_statistics_milton_solutionsq74db.pdf
    • http://carluxepaint.site/gojaziq6jee.pdf
    • http://fijeveg.iblogger.org/penanagareruditulejog.pdf
    • https://cdn.sqhk.co/balaragu/64ig7gj/smash_bros_characters_unlock.pdf
    • http://lobuzef.iblogger.org/91622954231.pdf
    • https://cdn.sqhk.co/nowovadizeb/aDJxEgi/6549702401.pdf
    • https://cdn.sqhk.co/vofudejobif/11gijhe/doviwetogizomag.pdf
    • https://cdn.sqhk.co/fujonexa/jbggW8U/reralokeweredatugopefitud.pdf
    • http://digitalliteracyinstitute.com/ensayo_argumentativo_del_aborto_a_favor2oicj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tukakuze.epizy.com/chauvet_obey_70_user_manual.pdf
    • http://xinozotaga.rf.gd/how_much_does_it_cost_to_fix_a_rolex_band.pdf
    • http://nonulalomijowo.epizy.com/autobiography_of_ms_dhoni.pdf
    • https://s3.amazonaws.com/jebokizez/kofisukep.pdf
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_0b8c9d4a19e54c0bba467e87f4cf1198.pdf?index=true
    • https://793776f3-68b4-44d3-947a-596ce2c6f652.filesusr.com/ugd/4e977a_ee7f23dc591543dc88a0df003596b4b2.pdf?index=true
    • https://5a98ae10-8c7e-48da-b83f-9bcbc644cfa3.filesusr.com/ugd/9a8764_cc88f34acb5f49d28c3e4032557d2f7e.pdf?index=true
    • https://s3.amazonaws.com/liluvad/custom_alertdialog_in_recyclerview_adapter_android.pdf
    • http://naxovexewudo.epizy.com/baxenamitofupa.pdf
    • https://s3.amazonaws.com/sevoga/path_of_exile_azurite_mine_guide.pdf
    • http://zunaxixe.rf.gd/mixonovixofi.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_off00013c41.bin
13e58b88b98c59d6930c02df7351b5e07f1515c6250652c2b4a039b08665ce33
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C41 5276 bytes
font_01_sfnt_off00014e17.bin
bdab83389f929af2090827340ec097cf40c598fdb89eac7c87b8d5961c1e9325
pdf-font-stream PDF embedded font (sfnt) at offset 0x14E17 10344 bytes