Malicious PDF — malware analysis report

Static analysis result for SHA-256 6215deff16155b98…

MALICIOUS

PDF

136.9 KB Created: 2021-03-29 03:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5e168d81edf2613247294086564a2edb SHA-1: 550ce6ae0a9ca8bb8017168eb4c51afc1e1505ec SHA-256: 6215deff16155b98eb9ccd0abafc10d0f640b5a9321bbc54b6f3e56fa3112fb5
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • 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.
  • 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://ponafet.ru/award?keyword=composite+materials+applications+pdf PDF link annotation
    • http://pakunobun.getenjoyment.net/54785079041.pdfIn PDF document text
    • https://cdn.sqhk.co/berirenike/9HjaoXn/stickfight_archer_mod_apk_unlimited_money_and_gems.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401972/normal_604ec9bc8a9c2.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/ijg1TLJ/international_business_management_best_universities_uk.pdfIn PDF document text
    • https://rarasuxa.weebly.com/uploads/1/3/1/3/131398432/wopasu-zolagu.pdfIn PDF document text
    • http://fishing-rods2.club/joplin_tornado_video_gas_stationrnwch.pdfIn PDF document text
    • https://nekatiru.weebly.com/uploads/1/3/2/6/132695473/koxodavenepo-juxedapu-lopoju-zezulepivuw.pdfIn PDF document text
    • https://cdn.sqhk.co/nozelezinofa/iI78iez/betakeleruvoferitaxogu.pdfIn PDF document text
    • http://bestcreditcheck.info/tuwixuqteap.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://bativazuwa.weebly.com/uploads/1/3/0/9/130969541/947f1e.pdfIn PDF document text
    • https://cdn.sqhk.co/pifajaloro/fnPie8o/vajogoxusifonixuzolilojuv.pdfIn PDF document text
    • https://kifofudodor.weebly.com/uploads/1/3/4/8/134878181/nawebewa-ridopa-zexubirajer-kisiw.pdfIn PDF document text
    • http://gachihyper.xyz/38574948432o2sko.pdfIn PDF document text
    • https://jomigivava.weebly.com/uploads/1/3/5/3/135330213/3944979.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/Jf7gjij/hockey_face_mask_covid_19.pdfIn PDF document text
    • http://rivepozepuxar.mywebcommunity.org/very_short_story_of_cinderella.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506159/normal_605708aa6c735.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuxokoberibaw.atwebpages.com/69601775941.pdfIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_70b1a5d081bb4c29a4c45f6eb489451d.pdf?index=trueIn PDF document text
    • https://359ea524-acbf-40a7-8d58-ee96a8f10bc8.filesusr.com/ugd/ca2e76_7d4a71af092f4532b3a9f95aab703da5.pdf?index=trueIn PDF document text
    • https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_12a5a2cd486d4b3f935956bac2c52b9d.pdf?index=trueIn PDF document text
    • https://c22e5cf4-338a-4003-9cad-c1cb0be29285.filesusr.com/ugd/3db607_d46632c381c7445e91ab67550416da64.pdf?index=trueIn PDF document text
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_604367220fd545aa97c84c7661ad3803.pdf?index=trueIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001be57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE57 5208 bytes
SHA-256: 600d253f1cb9178dc1ceaac455ba2c980f5d5f2a797155486793219820e1688b
font_01_sfnt_off0001cfec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CFEC 14592 bytes
SHA-256: d38f8d7041ddb55a6d0f57fdddb96ee2cfd7aae57c9aa30d1c5a7838f23ec4c3
font_02_sfnt_off0001ff6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF6E 16200 bytes
SHA-256: 8b1f9e60c2c4c97be5ca16ce80663ffad960f1e538cf82d06d39fc1e723c44e3

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