Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d4963e7aaf4b77…

MALICIOUS

PDF

106.0 KB Created: 2021-03-18 20:05:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f8532f17e820da936b194a3dfd1266bd SHA-1: 5f69420bc458fccd43a7d76369f280b9d56d893d SHA-256: 98d4963e7aaf4b77933ffc12ee8cbe98df77b768f9048c0569cb6883aefac6c4
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 pointing to disposable hosting, indicating a link farm designed to distribute traffic to potentially malicious sites. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were extracted, the structure and URL patterns strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://golowaki.ru/wix?keyword=teru+tendo+idolmaster+sidem PDF link annotation
    • http://natiral.space/transport_tycoon_2_free_downloadawlwi.pdfIn PDF document text
    • https://vimiwakemimug.weebly.com/uploads/1/3/1/6/131606159/xosuveresezu_vomapuperodor_gedonu.pdfIn PDF document text
    • https://paxolobiwoke.weebly.com/uploads/1/3/1/1/131163878/4c4015f36eb8.pdfIn PDF document text
    • http://de-bewertung-889562.icu/stardew_valley_best_combat_gearuflog.pdfIn PDF document text
    • https://fomodefoz.weebly.com/uploads/1/3/5/9/135958111/juxidipowawereb.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/vazosozexesemivicaixx.pdfIn PDF document text
    • http://medicinfo.online/vetizakuguvoleg0febj.pdfIn PDF document text
    • http://moreprodukti.com/char_broil_big_easy_air_fryer_turkey_recipe7vssu.pdfIn PDF document text
    • https://wasatetokis.weebly.com/uploads/1/3/4/5/134513062/nojajeturubakag-gozutajozav-zokojuxinitete-fijafalimoxekud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://351e5f87-f9e5-4015-92cd-d601692b9ec3.filesusr.com/ugd/a0d0d3_4e3854c81ab04d5388d8eb5bd3971b1d.pdf?index=trueIn PDF document text
    • https://80c8fd16-4cf8-4f9f-b52b-d6c956df8f3b.filesusr.com/ugd/1a94e8_1f5d82f1b93d4830a62c520f3410ff07.pdf?index=trueIn PDF document text
    • http://liwivudelaje.epizy.com/singer_simple_3232_manual_espaol.pdfIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_f459a73380ba4c6ea76c0b8ab49447c0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/donarepemi/l_t_infotech_annual_report_2017.pdfIn PDF document text
    • https://4de1274e-a26b-4e71-a0d1-d86f0cfee7ee.filesusr.com/ugd/ee4d88_95e4a75bce4640f995fd94d20a0ee17b.pdf?index=trueIn PDF document text
    • http://noxoposuxasife.rf.gd/18646107414.pdfIn PDF document text
    • https://8ca15cf9-c5bf-4329-906a-32df3c7b5ab7.filesusr.com/ugd/4ca7f5_99a2211c9a974c22ae6dea01dfa08932.pdf?index=trueIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_103d29d6a5da4f35ae2334723e8e07b4.pdf?index=trueIn PDF document text
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_f4caff26e48f446dac15f5f28331ef8c.pdf?index=trueIn PDF document text
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_16b401f3ec41405fba26165c0e5e7278.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kakef/backup_android_contacts_without_screen.pdfIn PDF document text
    • http://foxesixa.epizy.com/sufetutuvijukupomojun.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/zetalik.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_off0000fa0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0C 28312 bytes
SHA-256: 9971a17d70e2ef0e35cd74d382bde338b4b1fa7b1ffdc79cf62ee06982d3a5f1
font_01_sfnt_off0001540e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1540E 4920 bytes
SHA-256: ddd91e6a75ef4ae76d79f39acd7629e02c28e2f495385c57e589adb490209cb5
font_02_sfnt_off000164ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164AB 17476 bytes
SHA-256: 0d0f9e09e7f04050c1026e047c2924352bd138fe08e2176526ecb06cf8e45ebd

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