Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ef63ff8b4a3db2…

MALICIOUS

PDF

75.6 KB Created: 2020-12-19 16:53:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: cca5552de9fc566cd209682024ed2259 SHA-1: d90892fc7d1e672c44670e018827b650fe049777 SHA-256: 92ef63ff8b4a3db21fcf2589078ba86ae1d8ed3a3630ee64c77d032640b679ee
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/strik?utm_term=osprey+exos+38+carry+on PDF link annotation
    • https://zadujemerumid.weebly.com/uploads/1/3/2/6/132695269/wutitubujebobo.pdfIn PDF document text
    • https://gazelavulokar.weebly.com/uploads/1/3/4/2/134265358/nobik-duxaxa-dufagazawomalex-woviwagof.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/cb2ac3a2-38c4-43b0-85bf-894f9f70fcc8/29810953034.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/hard_sudoku_puzzles_with_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc9c6d242e893f6741e21c/t/5fdd0a88907d0c7fee15a7ee/1608321676652/33722041743.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdfcfaecb86110b1356bd8/t/5fd641a7dca22152603d492a/1607877032180/wrong_turn_full_movie_tamil_hd.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf2be3eec7ca5c3653b3b4/t/5fd709bade5b1220c041bbc2/1607928250472/50202225902.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/62081811608.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc569e5e2fce462bcaa2f17/t/5fca198855485c3109b91ce9/1607080328535/darunezitutagolezerute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eb027fb-2eb5-4aba-9503-2e2edd75c118/altra_furniture_owen_student_writing_desk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e790bdb33045eec25666/t/5fc619b0173fb5383b73f88a/1606818225576/kuvesivobofetefojuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73913165-1f65-4721-99c8-4f0944d598b8/animation_survival_kit_walk_cycle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dfbb708-c9d6-440b-a432-ea0bbc2e8881/7_spline_lug_nut_key_oreillys.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50cb47d0c8f249d5ba047/t/5fd6a407102ca46975edad25/1607902215466/57993542912.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4cbc6bdb33045eedb2023/t/5fd0d5163bcf75077a8c0e51/1607521559075/cara_membuat_video_dengan_movie_maker_windows_10.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_off0000c7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F4 10108 bytes
SHA-256: f0f6df3a21f1f0b951695d8ed5938c533d98f2e091086e25306deb17186ed997
font_01_sfnt_off0000e90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90C 5448 bytes
SHA-256: 21fc3d1e4c7529a07699cc4440892fee3cf597e5898970c2dc7605dbc73ee9a5
font_02_sfnt_off0000fbaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAF 10972 bytes
SHA-256: abccca80b988f0e191d7a3f6b0980bed8de0a47731596aa7ab36cbe9cd42b16e

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