Malicious PDF — malware analysis report

Static analysis result for SHA-256 2791183bb7c2dcfd…

MALICIOUS

PDF

92.5 KB Created: 2021-04-03 11:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fed00a26a26a00c0e077a79f9fc9bd84 SHA-1: b15c5f011c4559958d48c96be0728961325440af SHA-256: 2791183bb7c2dcfd6d59f55318977e4fdfbc1e0cb1650e1519c99ea1f11ab678
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://kuzutuzo.ru/123?utm_term=anguttara+nikaya+pdf PDF link annotation
    • http://gebogezu.22web.org/wafer_swing_check_valve.pdfIn PDF document text
    • http://coolvdomaion.online/215236554597m2l0.pdfIn PDF document text
    • http://simcars.ru/yamaha_motif_6_service_manualzw09e.pdfIn PDF document text
    • https://vevuduwas.weebly.com/uploads/1/3/0/7/130775740/5754130.pdfIn PDF document text
    • http://natur-green.fun/81568083046vcwi2.pdfIn PDF document text
    • http://dapujabowigu.sportsontheweb.net/77060359901.pdfIn PDF document text
    • http://latencfsrt.space/latest_delhi_metro_map_2019de989.pdfIn PDF document text
    • https://pikupazu.weebly.com/uploads/1/3/4/5/134577858/9676286.pdfIn PDF document text
    • http://natikolom.site/kotevu1r1eg.pdfIn PDF document text
    • http://levelupguild.com/maneke9w6p7.pdfIn PDF document text
    • http://dirtygirl.fun/tipimolurexopazusariwpo.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/canciones_catolicas_letras.pdfIn PDF document text
    • https://filokizufotol.weebly.com/uploads/1/3/4/4/134455434/xudog-fipem.pdfIn PDF document text
    • http://axecheat6.xyz/82009286982lp8kw.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/waduzirader/mulawe.pdfIn PDF document text
    • http://wikukodukoja.onlinewebshop.net/bugler_s_holiday_leroy_anderson.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/indian_rupee_symbol_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/penubiwevuwiwogafulikir.pdfIn PDF document text
    • http://dogirajuwuxo.epizy.com/life_in_pieces_season_4_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/50537251534.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/dodigivuf.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE90 5644 bytes
SHA-256: 46da9948fcfd1445f61da5e3b48ef19a4c8edab10e8e697f0ba3341e88b87693
font_01_sfnt_off0001122c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122C 5156 bytes
SHA-256: 3f0c394d6c40f50b2e978516ffe7e1d667fcf8d1390ae525ba1c5c47065f87ab
font_02_sfnt_off000123df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123DF 12408 bytes
SHA-256: f3aaa202386909a2daa1b80e9e3307a4cbf5b6c4a49b36d2ecee5b88cfaacdd7
font_03_sfnt_off00014d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D00 16204 bytes
SHA-256: 31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf

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