Malicious PDF — malware analysis report

Static analysis result for SHA-256 13b91e7f3004a6f3…

MALICIOUS

PDF

91.9 KB Created: 2021-03-16 12:42:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cd239d9d0ad1f391ed199816845969c SHA-1: 7e6a6ffec6959d433fd5644cca519b96125d8fc5 SHA-256: 13b91e7f3004a6f370b44753d6b6585ced870c21b69fbbd1fd23fcfacb052079
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam lure. It contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains keywords related to legal documents and financial transactions, reinforcing the scam pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/wix?keyword=affidavit+of+good+moral+character+pdf
    • http://vojupobakovax.iblogger.org/71795394908.pdf
    • http://metinozub.iblogger.org/broken_wings_jaymin_eve.pdf
    • https://cdn.sqhk.co/fenazijeguk/vjggdgy/offroad_lx_simulator_hack_mod_apk.pdf
    • http://zuluguvo.iblogger.org/abhimanyu_movie_audio_songs.pdf
    • http://jozebemi.iblogger.org/multivariate_statistic_regression.pdf
    • http://saxefitipar.iblogger.org/44353678090.pdf
    • https://cdn.sqhk.co/guvawatuzax/ijdRgf9/assamese_shiv_bhakti_song.pdf
    • http://rafupofamurawaf.mygamesonline.org/bella_cucina_waffle_cone_maker_instructions.pdf
    • http://memisada.mygamesonline.org/zikalijovemogofetedew.pdf
    • https://cdn-cms.f-static.net/uploads/4449600/normal_604cd9d9ccca8.pdf
    • https://cdn-cms.f-static.net/uploads/4452835/normal_603f165e2ece4.pdf
    • https://cdn.sqhk.co/wakunexigoto/ighajcL/pobajiribuj.pdf
    • http://ludirobus.getenjoyment.net/general_chemistry_atomic_structure.pdf
    • https://cdn-cms.f-static.net/uploads/4366367/normal_601549bd47845.pdf
    • https://cdn-cms.f-static.net/uploads/4459165/normal_60217ca5a1425.pdf
    • https://cdn.sqhk.co/zikufivol/iZ70jik/ballet_dance_classes_for_teenage_beginners_near_me.pdf
    • http://lazokiwumemo.mygamesonline.org/adobe_illustrator_cs6_tutorials_for_beginners.pdf
    • https://cdn.sqhk.co/vesagivara/DzEhfhh/space_code_galaxy_alien_top_down_shooter.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_29788a776c8142779b5886b6c741153f.pdf?index=true
    • http://zabipir.rf.gd/approval_matrix_template.pdf
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_eb80869caba04a08a0bec4bc57855e44.pdf?index=true
    • http://xuvekixofeku.onlinewebshop.net/how_to_turn_volume_down_on_adt_panel.pdf
    • https://0aa989e7-076c-475f-bc22-fff5ae310860.filesusr.com/ugd/b44be6_ca9335759e064c6d8008f9289cea3097.pdf?index=true
    • https://d52aed46-be45-4f9b-8106-cf6fc7ee66c0.filesusr.com/ugd/b148e5_f177bee9fc124bc7824828851bc7d110.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011004.bin
2ec8428abcbbd9d8082e99d379dcc7b450b63272d09e633475eebcbb4ab2474f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11004 5440 bytes
font_01_sfnt_off00012268.bin
67e644cf957d1fa891a9e628ad0e9973623bff2287730e83360e2d64249f3595		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12268 11708 bytes
font_02_sfnt_off00014a60.bin
2732c78df68b4531e26da51a256f0f9ab881cb8a96d1886ade34872d88eeece3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A60 16140 bytes

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