Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e82c4db421fc01a…

MALICIOUS

PDF

75.4 KB Created: 2021-01-08 14:08:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 70db10823e8ba2522039f19a7a9a0cfd SHA-1: e859e77de1b3573576700eeb32fcb2e97bfd4a02 SHA-256: 6e82c4db421fc01a1421c00b13b751cfa0dcc3f4227bd325ae97f8b8666d3fac
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to direct users to potentially harmful websites. The ClamAV detection and ML classifier strongly indicate malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malicious redirection attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://trafftec.ru/123?utm_term=uke+play+along+memories PDF link annotation
    • https://cdn.sqhk.co/tivuzofep/djcieha/zifowopasuwubizijakone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424405/normal_5ff37e0cd3ff8.pdfIn PDF document text
    • https://jinunezig.weebly.com/uploads/1/3/4/3/134308797/lalukew-zolusinowamaxi-lofarixuxexoxe-nugetos.pdfIn PDF document text
    • https://cdn.sqhk.co/rosojolude/Gjbgjie/line_segment_calculator.pdfIn PDF document text
    • https://wakejowedab.weebly.com/uploads/1/3/4/5/134599651/dawego_sonizo_simolodezumijuv_gofibanova.pdfIn PDF document text
    • https://ruwadegefanum.weebly.com/uploads/1/3/4/1/134108857/sudifuv-rejodavoduxanim-nigazupurozu-wetolalu.pdfIn PDF document text
    • https://jotinebemoti.weebly.com/uploads/1/3/4/6/134681432/toxubeno.pdfIn PDF document text
    • https://cdn.sqhk.co/janonaset/hiagdij/77213851487.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
    • https://s3.amazonaws.com/dazutun/android_games_temple_run_3_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/30033364056.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/18994031008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27245f3b-928c-4be1-961a-977e4444c427/35815264196.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/12824492435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c61a1b84-bfc1-4656-920b-c57bf1438065/82697761680.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_off0000dc68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC68 5004 bytes
SHA-256: 2e6bc879966111ee8c881ddf9a1927ef4fa9e331927fc67f59a7ea0dc4a9f1ec
font_01_sfnt_off0000ed51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED51 10848 bytes
SHA-256: 62e0a4ee6474c21f203c80b6540f1d90515caac53abd2c240334cf93cfce1839
font_02_sfnt_off00011261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11261 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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