Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e90a380a799cd3a…

MALICIOUS

PDF

86.9 KB Created: 2021-02-28 06:06:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c1171d3f506cd7a60ae7a92ea47bd23c SHA-1: f706688a8ed7c312847b9da0a155ca6dabc40ddf SHA-256: 5e90a380a799cd3aa76810dc5ecc3d4cf5de0583f6d6e015d42ad7b6ebb6fd02
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, indicative of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the PDF structure suggest it may leverage embedded JavaScript to facilitate the redirection to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dugedepap.ru/strik?utm_term=waterboss+700+service PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464314/normal_5fddc02e3f08c.pdfIn PDF document text
    • https://jijelejo.weebly.com/uploads/1/3/4/5/134590633/mibawobevu.pdfIn PDF document text
    • https://sumulepali.weebly.com/uploads/1/3/4/8/134882140/592bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454971/normal_5fe182420a710.pdfIn PDF document text
    • https://pokukumujipuk.weebly.com/uploads/1/3/1/8/131856200/zedemijuzo.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/hchjuge/xasewovigibosej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423715/normal_603860c8ad283.pdfIn PDF document text
    • http://teksalon.xyz/44836503058i3olt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372723/normal_5fc9b5baab328.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379370/normal_5fcd70f64a4f4.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/hddjajc/47081852124.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461746/normal_60150fa11651d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460966/normal_5ff7ea85270e6.pdfIn PDF document text
    • https://cdn.sqhk.co/govamopega/ijj4jg0/medutivasopakam.pdfIn PDF document text
    • https://cdn.sqhk.co/fagisuxupinu/BgcjgqV/12746408541.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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_off00010607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10607 4876 bytes
SHA-256: d3ce4cb314aadc487335a883160b5d7522802ca7b30e7fde73ce9867fe5dcd56
font_01_sfnt_off000116c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C2 12216 bytes
SHA-256: 2ae1e15b0b111047531cd4f00e00fc2747aff54b5631a0a608c2613ff3331556
font_02_sfnt_off00013eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EEA 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

Open this report in the interactive analyzer, or submit your own file for analysis.