Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3fed88a9fbed4b4…

MALICIOUS

PDF

81.3 KB Created: 2021-04-03 22:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a9ea12787632cbbd4ff3864368deb30 SHA-1: 7bd5485394058957720e85644ead35ae81ba809b SHA-256: e3fed88a9fbed4b4fed2f7785bd713fb07377b866805a5830abaaa20abb2b825
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a PDF SEO link farm. The primary URL points to a search query related to car parts, suggesting a potential lure. While no scripts were explicitly extracted, the presence of numerous external links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a malicious intent to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • 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://jacksth.ru/wix?keyword=2020+subaru+outback+xt+exhaust
    • https://kunoloxudiruk.weebly.com/uploads/1/3/4/7/134767428/75e0b.pdf
    • https://cdn.sqhk.co/noloxunipe/2gigijd/guwurisonolixewewefes.pdf
    • https://tovimovu.weebly.com/uploads/1/3/0/9/130969206/08f86ae753.pdf
    • https://cdn.sqhk.co/xagogudexo/FhdjbPq/gisisepofutagoxunosuwav.pdf
    • https://bigikudas.weebly.com/uploads/1/3/0/7/130775628/rixetezorus.pdf
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/196135.pdf
    • https://pufusotek.weebly.com/uploads/1/3/4/3/134376533/4929781.pdf
    • https://vagesazo.weebly.com/uploads/1/3/4/7/134747595/kimifak_tanisudi_gabomegime_gomizavuvisu.pdf
    • https://xuvitekopa.weebly.com/uploads/1/3/2/7/132712193/feweve.pdf
    • https://zidifupo.weebly.com/uploads/1/3/4/4/134475425/4101b4dc4.pdf
    • https://gimalijuvilonur.weebly.com/uploads/1/3/4/6/134619020/b35c032.pdf
    • https://werirubiteda.weebly.com/uploads/1/3/5/9/135972418/43335b0096c155.pdf
    • https://cdn.sqhk.co/resilano/gYqOOic/6132737987.pdf
    • https://cdn.sqhk.co/xisalaximel/jjXgjiq/3d_thunder_hammer_themes.pdf
    • https://zugimawaxudal.weebly.com/uploads/1/3/1/4/131410952/a73c4fb9f6e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/vovuzize/lokixizakaju.pdf
    • https://s3.amazonaws.com/jawusawar/vulanabemiretu.pdf
    • https://s3.amazonaws.com/batiku/baby_hazel_games_no.pdf
    • https://s3.amazonaws.com/zozofufulolig/plato_five_dialogues_sparknotes_apology.pdf
    • https://s3.amazonaws.com/tuletivotarupu/36724766659.pdf
    • https://s3.amazonaws.com/nonipesikiri/how_to_do_ortega_method_on_2x2.pdf
    • https://s3.amazonaws.com/jirebonudur/hooke_s_law_experiment_lab_report_theory.pdf
    • https://s3.amazonaws.com/loxopudizus/wow_classic_shadow_priest_guide.pdf
    • https://s3.amazonaws.com/wupixufekijax/31925621434.pdf
    • https://s3.amazonaws.com/jufowokedunod/devojimuxojotolonixoxux.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f211.bin
6f7c1caeff8901b768d6e4eb52b7a3cbf395d2b8750ef83eecc98714bb2c8dd8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF211 5036 bytes
font_01_sfnt_off00010337.bin
cef1aedf9f3f5405b07d72baa24cb1cbab4dbf2c5ffaa626cace622c8728fdfd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10337 11284 bytes
font_02_sfnt_off000129c9.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x129C9 4324 bytes