Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a08880babb712b0…

MALICIOUS

PDF

79.7 KB Created: 2021-03-13 13:54:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 11f76fa8e54eee8a06ec60b6dcedfb7d SHA-1: 56f14b74b7d27959a7860b478aa5d4b59e4301ea SHA-256: 7a08880babb712b0dfc2a2ae93accc1ca78a070fca4fcdd60b01affa662b8433
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to distribute malicious content or facilitate phishing. ClamAV and ML classifiers strongly indicate maliciousness, and the presence of numerous external URIs supports this assessment. The primary attack pattern involves directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://kuzutuzo.ru/123?utm_term=studio+ghibli+songs+piano+sheet+music PDF link annotation
    • http://tipofeliluget.medianewsonline.com/oxford_picture_dictionary_third_edition_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zutoruxutu/eiihhij/microsoft_translator_api_free.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/feihZtG/bingo_live_stream_app.pdfIn PDF document text
    • https://cdn.sqhk.co/medukukekuke/cifugiT/dungeon_and_heroes_3d_rpg_mod_apk.pdfIn PDF document text
    • https://jukosixosibi.weebly.com/uploads/1/3/1/8/131871462/5b1098.pdfIn PDF document text
    • https://fifekususelamib.weebly.com/uploads/1/3/5/3/135349053/9212572.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/rekomor.pdfIn PDF document text
    • https://jifurutirijiguj.weebly.com/uploads/1/3/4/5/134528482/natojunorepul.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/ghhgg0n/62958934931.pdfIn PDF document text
    • https://cdn.sqhk.co/kejofuvata/Oha7gfj/survival_game_thirst_hunger.pdfIn PDF document text
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/5a0704315468.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/gehjgjB/bombshell_cast_makeup.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://50b44c92-959e-4a15-bf83-93d6b2b518d6.filesusr.com/ugd/3ed44c_058ef70f9b77499fa8c8316dcb1303c7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/forupokisip/philips_universal_remote_srp9232d_27_code_list.pdfIn PDF document text
    • https://e148473a-3d1a-46f8-b788-fbc1f5af68d4.filesusr.com/ugd/e1e70b_c9678742eef644c68e366d0dce617cd9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bogijexu/brain_teaser_maths_puzzles_with_answers.pdfIn PDF document text
    • https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_bb732c50a168463bb4f295843744733a.pdf?index=trueIn PDF document text
    • https://bac325b5-3710-4a60-ba01-c1ac5e8a7650.filesusr.com/ugd/c111de_532197e841314ac79012d1deee511732.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/foxenudale.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/metformin_hydrochloride_drug.pdfIn PDF document text
    • https://7835c217-6b95-46a1-915a-76cdebae3fe0.filesusr.com/ugd/debfb4_885850e78d4944cabb36ba4b25371961.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legipalofi/automated_manual_transmission_semi_truck.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_off0000ead1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD1 5516 bytes
SHA-256: c2b83fad493849c5b101775c1985c36d4aaee6a855d03c6951adc65e7186aa8a
font_01_sfnt_off0000fd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD54 11080 bytes
SHA-256: 46360d320e1db5322864dfc6f9577fcc4a2cc94e0fe56195be431f6074f63ef6
font_02_sfnt_off0001232e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333