Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc506b92d339c54d…

MALICIOUS

PDF

74.8 KB Created: 2021-02-10 19:52:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5b638445010122c1f9a6f87603f6b202 SHA-1: 101f7eeae6c239682d576034e0d7d189b165282e SHA-256: fc506b92d339c54db9af93f77a2b35c5f4a5b70369772c151ab81a2b4af822bf
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for a PDF link farm containing numerous external links. The ML classifier also assigned a high probability of maliciousness. The embedded URLs suggest an attempt to redirect users to potentially harmful content, likely for phishing or malware distribution. No scripts were extracted from this sample.

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/wb?keyword=devi%20chitralekha%20video%20songs PDF link annotation
    • https://gikotaduxig.weebly.com/uploads/1/3/1/4/131454052/fekupujo.pdfIn PDF document text
    • http://copyrights-notices-helps.com/industrial_applications_of_nanotechnologyslepn.pdfIn PDF document text
    • https://wajajudamivigo.weebly.com/uploads/1/3/4/3/134359543/napawajawugonojej.pdfIn PDF document text
    • https://tekoriforeta.weebly.com/uploads/1/3/4/6/134639422/f743bfb60b00.pdfIn PDF document text
    • https://bewepuxajijasi.weebly.com/uploads/1/3/4/3/134362307/kavanezu-dafigev-dijofakewufede-lolokidizelebor.pdfIn PDF document text
    • http://moekolechko.icu/boxing_star_game_wikizvoza.pdfIn PDF document text
    • https://vawosikajoj.weebly.com/uploads/1/3/1/4/131438279/5fbebffb7589c.pdfIn PDF document text
    • https://molawakipo.weebly.com/uploads/1/3/1/3/131379716/3219897.pdfIn PDF document text
    • https://gajebafanagifim.weebly.com/uploads/1/3/2/8/132815836/8648017.pdfIn PDF document text
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/sozimolo_siwiwu_xaris_nipiwefovomo.pdfIn PDF document text
    • http://flowerport.store/php_code_formatter_library7698u.pdfIn PDF document text
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/fubalunosuwuzibe.pdfIn PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/1326128.pdfIn PDF document text
    • http://docita.fun/zateposetreb0.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/tubupejevomo/spider_man_bangla_comics.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/ice_breaking_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/voice_recorder_free_app.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/wimawofopadijuwuzegos.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/integrated_science_2_study_guide.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_off0000e57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57E 5324 bytes
SHA-256: 37fd4c1336b7584ec90842b5aa728a32b099787daed89a72d0a1d57e2df0d328
font_01_sfnt_off0000f79c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79C 11408 bytes
SHA-256: 02b4985a4f91ac0c86c110e93ce3339e4b1aad0518e81e1950f8eee29937f1fb

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