Malicious PDF — malware analysis report

Static analysis result for SHA-256 6341aa7ce1c5d7f2…

MALICIOUS

PDF

75.7 KB Created: 2021-02-24 14:10:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 09418d362309257dafe9fe51b453ae26 SHA-1: 408b9b86b2cdcee7153b9a3646345d5633bf97bc SHA-256: 6341aa7ce1c5d7f29271e8cf9772da9163d02e56e9fc659851ca5b047d5cbbf1
234 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, many of which are hosted on link farms like Weebly, suggesting a phishing or scam attempt. The primary malicious link directs to a known redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://crophysi.ru/strik?utm_term=how+to+become+a+certified+welding+educator In PDF document text
    • https://fekebejoluxoji.weebly.com/uploads/1/3/4/3/134309121/davulujul.pdfIn PDF document text
    • https://bomoturu.weebly.com/uploads/1/3/1/3/131384468/vadud_pipafu_vosafojijexal.pdfIn PDF document text
    • https://vomenipof.weebly.com/uploads/1/3/4/5/134585177/2194026.pdfIn PDF document text
    • https://bawapumur.weebly.com/uploads/1/3/4/4/134466187/9816822.pdfIn PDF document text
    • https://poxesaxe.weebly.com/uploads/1/3/0/7/130738711/fanadepifotet.pdfIn PDF document text
    • https://sigurapefudaji.weebly.com/uploads/1/3/4/5/134576843/gifujijelibuzel_koromu_fufiraxaxizode_nedavezulize.pdfIn PDF document text
    • https://cdn.sqhk.co/fekawifen/jhIV3Kb/elton_john_songs_list_download.pdfIn PDF document text
    • https://zejosawazir.weebly.com/uploads/1/3/1/8/131856185/9e7d9518d96.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/dd9hg3c/red_alert_2_mods_best.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/djhnih5/great_pyramid_of_egypt_history.pdfIn PDF document text
    • https://cdn.sqhk.co/dogilijesiwu/hhgde7W/happy_birthday_gif_funny.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367961/normal_602386a260152.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/tanikanaw/16964100174.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/10602403211.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/fozeriviravaraseloto.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/nfl_fantasy_cheat_sheet_ppr_league.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_off0000e9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F8 5356 bytes
SHA-256: 3f4a65fc21ae3c2096a5599acba72b6c41dd6c0e3a775c4462f8bcf92fe22672
font_01_sfnt_off0000fc27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC27 10920 bytes
SHA-256: 2a72bf421e89d5f7efa7fa78929eee80f23a1e33d0f419c5d65eb439e3c69d81

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