Malicious PDF — malware analysis report

Static analysis result for SHA-256 da1ff568a89eba05…

MALICIOUS

PDF

84.8 KB Created: 2021-03-28 18:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4668e269b6ed655069e300220c64bbb1 SHA-1: de2bbdc4e515afa600824ad5760e13d2bb387176 SHA-256: da1ff568a89eba05bae13f912916c90747bf9e4baebf7745d000331f17130dbb
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to disposable hosting, indicating a link farm or SEO manipulation tactic. The presence of a malicious URL and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malicious redirection attempt. No scripts were extracted, but the PDF structure itself is designed to lead users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://baarspo.ru/123?utm_term=abbas+mahmoud+al+akkad+pdf PDF link annotation
    • http://wujejejifi.mygamesonline.org/anabolic_diet_pasquale.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/11067228780.pdfIn PDF document text
    • http://tuwasukam.getenjoyment.net/the_mixed_up_files_of_basil_e_frankweiler.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/85919091142.pdfIn PDF document text
    • http://giwewigipebi.medianewsonline.com/simple_reading_comprehension_test_with_answers.pdfIn PDF document text
    • http://muxoman.mygamesonline.org/use_articles_english_grammar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c17323f4-76b6-44ef-bfe2-728c5a467eca/ap_spanish_literature_literary_terms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c769e2a-673d-4790-bbae-5afca52ca38b/84484969249.pdfIn PDF document text
    • https://db244590-af71-4c33-bd6e-2f8f55f31281.filesusr.com/ugd/fdab61_2f3cb60b28894e02af5a33fe893d05b8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea8df469-95ef-4e25-84e9-dc426668ffae/zunumifiwaxemivaketomasa.pdfIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_61581661b73b411b966908ad464d1d89.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3215880-197d-4839-9900-27ac624eee59/femijidorinojozito.pdfIn PDF document text
    • http://sidabimesalib.epizy.com/cadbury_report_1992_corporate_governance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad789af2-2798-44bb-99f1-f10eae5a8b84/como_puede_influir_los_medios_de_comunicacion_en_una_empresa.pdfIn PDF document text
    • http://luzutajezilako.rf.gd/kixitutujexomopuxavipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a74169bb-0c45-4387-b365-472d92667c15/how_to_sharpen_your_business_writing_skills.pdfIn PDF document text
    • http://masusoxowep.onlinewebshop.net/vulunanabetireronexoketep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85deb973-208c-483a-afe4-8a337ae08fff/zupitozigotoxotowulow.pdfIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_d46670b87d2e433ea80942bd41a5ebd2.pdf?index=trueIn PDF document text
    • http://zepuwiz.atwebpages.com/walmart_open_hours_today_near_me.pdfIn PDF document text
    • http://jefevuxivux.epizy.com/java_jvm_1._8_mac.pdfIn PDF document text
    • https://4fe85328-8dbf-40e9-afa8-2c8d6ff8a9c8.filesusr.com/ugd/9c0842_6e9d3e71c4bd4351a9cd4eac0d335206.pdf?index=trueIn PDF document text
    • https://fab88ded-2f12-46c9-b6ec-f290036286cc.filesusr.com/ugd/cce69c_c32b2626622b4ec0aa992576bd14c0b2.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF268 5380 bytes
SHA-256: b3ede21512518eca5a1b2ec3d94f3303b511718296f656ea69b03868fa906449
font_01_sfnt_off0001048b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048B 11976 bytes
SHA-256: 49bb6956f4029db6101bd946bb91f07d34c23aff9828c6666e86ef6a1f19c45e
font_02_sfnt_off00012b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B34 17580 bytes
SHA-256: 2b95989ee11b8c2ae348824a54564c98c6e9547e08c023a7b186b4d94886eebb