Malicious PDF — malware analysis report

Static analysis result for SHA-256 369c669c4c713d9d…

MALICIOUS

PDF

77.0 KB Created: 2021-04-01 22:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8e26b11c5fb29194f47fdf02f13fe94e SHA-1: 818e67542e39eaee96da070d120b40a0e86a7e41 SHA-256: 369c669c4c713d9d05ce792a69e15e183b4f6e2ecf57063a436bb805850ba2f1
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 domains, indicating a link farm designed to distribute malicious content or phish for information. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/award?keyword=rrb+stenographer+syllabus+pdf PDF link annotation
    • https://vofirojaj.weebly.com/uploads/1/3/1/6/131637635/07041ab12e09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412999/normal_603ce83b4d1a0.pdfIn PDF document text
    • https://tetaretutu.weebly.com/uploads/1/3/4/8/134872422/gunudorixojomon-fetifi.pdfIn PDF document text
    • http://justamorem.com/creative_visualization_definition09ifv.pdfIn PDF document text
    • http://nulivanofika.mygamesonline.org/vixawusotefu.pdfIn PDF document text
    • http://carbags.site/54597335800iap2r.pdfIn PDF document text
    • https://pakosikan.weebly.com/uploads/1/3/0/7/130740558/zeruxuf.pdfIn PDF document text
    • https://katodelof.weebly.com/uploads/1/3/6/0/136051175/xibitewananam-wevuzawutuk.pdfIn PDF document text
    • http://sutiboju.sportsontheweb.net/85621095218.pdfIn PDF document text
    • http://svoydvalend.xyz/difference_between_android_and_windows_operating_systemf4qid.pdfIn PDF document text
    • https://rawoxozuk.weebly.com/uploads/1/3/2/6/132695352/6bd105.pdfIn PDF document text
    • http://italylife.pro/infinix_note_4_price_in_nigeria_2018sr3qr.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/will_game_of_thrones_books_be_completed578jt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495244/normal_60074772d8469.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470981/normal_5ffead9a9360c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wifofevowogak.onlinewebshop.net/carry_on_rainbow_rowell.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/information_security_community_site.pdfIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_c7477bda641b4066a0815c03c421342a.pdf?index=trueIn PDF document text
    • https://2e21b658-2967-4279-8f18-a03590b678a5.filesusr.com/ugd/f5e1b2_5b9603ade2314806b24e290969fdfb14.pdf?index=trueIn PDF document text
    • http://filosoko.onlinewebshop.net/xibifoganusaf.pdfIn PDF document text
    • https://0ddd2631-58c7-464c-86d0-a5d1d8121c04.filesusr.com/ugd/301b85_f08f5bfcea6f4a16badc0f67ad22f15d.pdf?index=trueIn PDF document text
    • https://c1bbde11-5cda-4f7c-8b74-b2fe90b484f5.filesusr.com/ugd/1c8c6c_47c0ff18f6c24910a8167d0a8d1a504b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/axial_scx10_2_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/building_your_mate_s_self_esteem.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_off0000ed96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED96 5552 bytes
SHA-256: bd918efeadb8d29bcad88d13779fc2b92727956756f7f6188cf8feec8514325f
font_01_sfnt_off0001007d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007D 10832 bytes
SHA-256: 7ed42517e4dc67ccda55fd2443edfc46606424c09271f2bd23cfcd5f00045c94