Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d815f0aab99b945…

MALICIOUS

PDF

69.5 KB Created: 2021-03-29 08:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7818b4f206610f673acda01195c00d23 SHA-1: d4ef0ab90770f495bf51a7a53501fbdff10e6c58 SHA-256: 1d815f0aab99b9458b15b727b54b2661e60005d861e674aa44feea7801fb5e3a
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a significant number of external links, including a link farm heuristic firing, suggesting a phishing or SEO abuse attempt. One of the embedded URLs, 'https://jumiwimov.ru/wix?keyword=pinch+hitter+unblocked', is a primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/wix?keyword=pinch+hitter+unblocked
    • https://kevesotajomuvow.weebly.com/uploads/1/3/5/9/135959451/7c2c3.pdf
    • http://gaxixumerimu.iblogger.org/36686060191.pdf
    • http://bukenisefino.mygamesonline.org/92299539397.pdf
    • http://fegiroxopirez.sportsontheweb.net/89021442876.pdf
    • http://desawigoxikugaw.mywebcommunity.org/american_english_file_3.pdf
    • https://besikutusesa.weebly.com/uploads/1/3/2/6/132681218/8eeb89027884.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bopulamumu.rf.gd/faxosipawodim.pdf
    • http://tunawibiga.rf.gd/fowubudezapa.pdf
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_eef1d7ef665a43179cf328d86d0b051e.pdf?index=true
    • https://s3.amazonaws.com/pululusodogi/3085862377.pdf
    • https://s3.amazonaws.com/musokejixami/quran_arabic_only.pdf
    • https://023e3b0e-89aa-4e00-bd19-175c11a0a9c0.filesusr.com/ugd/5f4883_59188bb045b04a79a717d9a4a7095f88.pdf?index=true
    • https://s3.amazonaws.com/risalenefazozo/fakeziz.pdf
    • https://s3.amazonaws.com/tugabijenovili/free_angai_geete_in_marathi.pdf
    • http://zefabuvo.rf.gd/kegopefozapakivupoxovufar.pdf
    • https://dc688580-c0ec-4ade-910b-7abffd870ab4.filesusr.com/ugd/096b61_7a6701e727e94f9a95f690e060e26e35.pdf?index=true
    • https://s3.amazonaws.com/vezumobigodub/ruwunelosuwoj.pdf
    • https://s3.amazonaws.com/pusori/tasubapa.pdf
    • https://s3.amazonaws.com/luropi/owl._carousel._min._js_free.pdf
    • http://ritumogadoj.onlinewebshop.net/zarawiziloluzuwusegiwuzu.pdf
    • https://s3.amazonaws.com/fulazelof/75306752107.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4eb.bin
50c437ea655c38bf88f7cf7ed688ac088b022319c7cfbebc977de8b7ffa176d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EB 4844 bytes
font_01_sfnt_off0000e556.bin
fdd55043ead75fbf197c7405b4bb7eaffea15bad6bdf387cae0b74908129156e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE556 10404 bytes

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