Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d389312e35708b…

MALICIOUS

PDF

71.5 KB Created: 2021-01-23 15:22:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ddbad8830cdc8bfccf917d11b0a7d388 SHA-1: b97afdc68116cc53d232f2406834302f394a054b SHA-256: 29d389312e35708bdd0c5dac4ec3228677200bc36c30e440c8bbd4e352229c1c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are to PDF files, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically identified as 'Pdf.Phishing.Trojan'. The embedded URLs likely serve as lures to phishing sites or malware distribution points.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/123?utm_term=72+arts+of+shaolin+full+pdf PDF link annotation
    • https://site-1178309.mozfiles.com/files/1178309/mugazisobiwilotaje.pdfIn PDF document text
    • https://site-1178057.mozfiles.com/files/1178057/the_sims_mobile_free_download_for_pc.pdfIn PDF document text
    • https://domexuvuk.weebly.com/uploads/1/3/0/7/130740212/derojegemilorugopo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451021/normal_5ffbfa251c2e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368997/normal_5ffb984688ec5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498986/normal_5ff95e3d83bce.pdfIn PDF document text
    • https://site-1180756.mozfiles.com/files/1180756/emergency_vet_cost_near_me.pdfIn PDF document text
    • https://site-1172860.mozfiles.com/files/1172860/nails_of_america_kingwood_texas.pdfIn PDF document text
    • https://tovawifigilad.weebly.com/uploads/1/3/0/7/130776196/3200458.pdfIn PDF document text
    • https://lafowujokunoro.weebly.com/uploads/1/3/0/7/130738997/2982561.pdfIn PDF document text
    • https://site-1179441.mozfiles.com/files/1179441/buddy_the_elf_throw_blanket.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369185/normal_5ff5ea7e9fbb8.pdfIn PDF document text
    • https://site-1178934.mozfiles.com/files/1178934/dead_space_3_cheats_pc_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427821/normal_5fd8224e15827.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/piwanisaj/55618576200.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/66328956194.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/gevomu.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/lulomidigek.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/sukikinidebuweju.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/21487945851.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_off0000d90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90C 5244 bytes
SHA-256: 240e5a0e10efee66e70d6e63caec95fc06e4649f873b805af183618fcdd8bb19
font_01_sfnt_off0000eadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADC 11264 bytes
SHA-256: 6b04eef8118fa6263436def848e53383ef59915eb2c8f438f2171af72ee8ff9b

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