Malicious PDF — malware analysis report

Static analysis result for SHA-256 62765ea3970e15bf…

MALICIOUS

PDF

75.1 KB Created: 2021-02-12 16:04:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: b0e154eec523aaf88d05e8ca87c18680 SHA-1: 48f6e7ac64a8b52759a97e29f6e3221eb4d3d727 SHA-256: 62765ea3970e15bffdf6dcc0519a72386dffc677d6a0b491fd873a4bea5cb38b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, characteristic of a link farm, with the primary lure being a 'study guide answer key'. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest an attempt to redirect the user to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/123?utm_term=tuck+everlasting+study+guide+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480749/normal_601290308ad16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385633/normal_5fffe231a2dab.pdfIn PDF document text
    • https://xakalawuvobovu.weebly.com/uploads/1/3/1/0/131071286/2336759.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368219/normal_5ff9a51573350.pdfIn PDF document text
    • https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/kijaxemajubulibek.pdfIn PDF document text
    • https://rupogasonewu.weebly.com/uploads/1/3/4/6/134653860/vexedadim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453105/normal_5fc966b97d0f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383321/normal_5ff84a448c02a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465269/normal_5febdadbc2878.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jipowumat/nasomawo.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/sheets_for_icandy_lime_carrycot.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/38665256266.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/fallout_4_curie_quest_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/skf_bearing_catalogue_full.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/chroma_key_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/zapujir.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/catalina_dmg_apple.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_off0000e98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98F 5372 bytes
SHA-256: e722c444788d102d94e953d563fe7f86bbd8b6ce92e583d7533abdfa698cd8dd
font_01_sfnt_off0000fbff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFF 10308 bytes
SHA-256: 3520ae042d2b64a571ae2f0ca57999c7ae4cea486879df41bcd6cee1cd2aa314

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