Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cbb977e06ad5573…

MALICIOUS

PDF

79.4 KB Created: 2021-03-05 02:51:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 03f9a434c8bb847eb45fdd2bfe3bbee2 SHA-1: ae3957e2e6a2383f8ac54a39e668add8bc4f83ef SHA-256: 8cbb977e06ad5573bb23a94ba3d98d52f7b377921388f877c68a8e4e9e139dcc
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains a URL that aligns with the heuristic findings of external URI usage.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/123?utm_term=how+to+rig+live+minnows+for+bass PDF link annotation
    • https://monoxoni.weebly.com/uploads/1/3/0/7/130738852/5287775.pdfIn PDF document text
    • http://bostpolamos.site/wu_tang_saga_episode_10_songpxr56.pdfIn PDF document text
    • https://bodonoweti.weebly.com/uploads/1/3/1/8/131856710/7523734.pdfIn PDF document text
    • http://elinekici.online/how_to_connect_a_samsung_blu_ray_player_to_wifigrufx.pdfIn PDF document text
    • https://bafuvaki.weebly.com/uploads/1/3/4/3/134336870/0d266.pdfIn PDF document text
    • http://summerita.fun/4214045653015c8.pdfIn PDF document text
    • http://okrasote.info/metal_gear_solid_v_the_phantom_pain_characters_playable0gt9v.pdfIn PDF document text
    • http://tekirivira.iblogger.org/11648236566.pdfIn PDF document text
    • http://lianhua.life/mijifuiy7qs.pdfIn PDF document text
    • http://securityverifiedservices.com/how_to_install_rainforest_jumperoona3xh.pdfIn PDF document text
    • http://kraftmann.su/telelajutuwimulirufililqmvb.pdfIn PDF document text
    • http://originalhallyu.com/kaponakomijuqe84n.pdfIn PDF document text
    • https://benerema.weebly.com/uploads/1/3/1/4/131408328/e0159.pdfIn PDF document text
    • http://vejawezodasupax.22web.org/blackstar_id_core_stereo_100_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/51628319007.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/sejarah_terbentuknya_amerika_serikat.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/whirlpool_cabrio_he_top_load_washer_manual.pdfIn PDF document text
    • http://zizakipu.epizy.com/nekubizagepumafuxoxuragi.pdfIn PDF document text
    • http://fojijiguvixano.rf.gd/golden_icon_pack_apk_arrow.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/gazuvivomebokuwizikinexu.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/biniwu.pdfIn PDF document text
    • http://jebetumupogo.rf.gd/probability_theory_worksheet_3_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/wuwafod.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/1375930083.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/99943986102.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/lagu_agnes_monica_orang_ketiga.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF473 5340 bytes
SHA-256: 4bafcfa0f8cd26b0e878241be2b2f95c11b7eb76e9b6f84d4d338071433692f7
font_01_sfnt_off000106a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A1 11644 bytes
SHA-256: bffa7a6d2032cd3ce6b2bddcb85ebb484cb9759c9c4f5af5f5750708606ad473

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