Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b938d10a9db7078…

MALICIOUS

PDF

83.0 KB Created: 2021-05-26 06:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ee3f96f0738e23ae5f38270dce1f6431 SHA-1: 222d65c42fe87632f6d1815d09ffe3beee6733b6 SHA-256: 3b938d10a9db707881af0b2553aa4c0add132a0d7a6066cf3b61a51999c753ad
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, designed to create a link farm. The embedded URL and document body suggest a lure for downloading 'dream league soccer 2018', indicating a phishing or scam attempt. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xezojetit.ru/strik?utm_term=download+dream+league+soccer+2018+for+pc+windows+10 PDF link annotation
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/beadb52b9d3c8e.pdfIn PDF document text
    • https://kimuximufa.weebly.com/uploads/1/3/4/1/134132687/fipepibe-fakezomagen-zesitujubuj-zezugu.pdfIn PDF document text
    • https://rifuxegu.weebly.com/uploads/1/3/4/5/134525143/furiviruxe_zetejavije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497079/normal_6009de25ef482.pdfIn PDF document text
    • https://tagojakiwuki.weebly.com/uploads/1/3/4/4/134444274/7825922.pdfIn PDF document text
    • https://mazazujusuvazix.weebly.com/uploads/1/3/1/8/131856432/wodeso.pdfIn PDF document text
    • https://vozuviwugil.weebly.com/uploads/1/3/2/6/132681927/suxaru_jijololulegawa_turitunazagabo_jedob.pdfIn PDF document text
    • https://mulofujuxemo.weebly.com/uploads/1/3/0/8/130874025/f7538678.pdfIn PDF document text
    • https://tebifuwufarul.weebly.com/uploads/1/3/4/8/134886387/e6a5cc6677a6b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476766/normal_6042c311bdb2f.pdfIn PDF document text
    • https://rebuxikaxaj.weebly.com/uploads/1/3/4/6/134668288/7646926.pdfIn PDF document text
    • https://digavonuvuveg.weebly.com/uploads/1/3/4/8/134851043/jepovevapir_nufutotate_nekunagopu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446165/normal_5fd9e6d188215.pdfIn PDF document text
    • https://mezepobavufu.weebly.com/uploads/1/3/4/7/134717124/8085447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_6059f0b8cb524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380858/normal_6038c4cde36dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446502/normal_60034d33e5318.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403557/normal_5feb5260b7161.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402720/normal_600f93583dc51.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3ac4c4e-810a-4289-8bb7-dd9ce2b16d21/42623441279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c67f56c-b88c-4a85-8251-a307961205ef/what_is_the_average_pay_for_medical_billing_and_coding.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7758b53c-c6b9-44f3-ad84-f2e80a908edb/wenotasegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fe88e4d-f6e8-43ae-ac83-ac4700aa524a/93154220453.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_off00010448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10448 6084 bytes
SHA-256: 16d7cdfcbd1e256f41a77d680428e097eb5d7b926d431c3104922d53f11e9b49
font_01_sfnt_off0001190c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190C 10872 bytes
SHA-256: 187efcec2999bf86c74750c82090259c2372b4a34f74306aeb95dceacd6e800b