Malicious PDF — malware analysis report

Static analysis result for SHA-256 14602e6abd595d48…

MALICIOUS

PDF

77.8 KB Created: 2021-02-08 00:57:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8dc2c915c6a9fd89a0b8d18ac2a470ba SHA-1: d82e5fe0bbcb1af66ee12736cc59be52968d02d5 SHA-256: 14602e6abd595d4876c4b890d82ec09b55ed57703ae004e5976df6ca5b0d80f3
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are SEO-optimized and point to potentially malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' firings confirm its malicious nature. The embedded URLs suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wb?keyword=android%209.%200%20samsung%20galaxy%20s7 PDF link annotation
    • http://roskycnmx.com/cyber_monday_2019_ping_pong_table6rdwf.pdfIn PDF document text
    • https://badikixokatapi.weebly.com/uploads/1/3/0/7/130739740/d86b45.pdfIn PDF document text
    • http://zoneeuro.pro/nasa_newsletter_subscription1wcoo.pdfIn PDF document text
    • https://cdn.sqhk.co/lupejatuwi/jdickX6/26426314649.pdfIn PDF document text
    • https://cdn.sqhk.co/remowiwa/BYviewv/31215312151.pdfIn PDF document text
    • https://fupakedozoj.weebly.com/uploads/1/3/1/4/131407080/jesamesenazab.pdfIn PDF document text
    • http://naturapple.space/makkar_ielts_speaking_topics_2019_with_answers_free_download87vwa.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/jUUibXu/47361623055.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/7uIXw0o/9622436450.pdfIn PDF document text
    • https://cdn.sqhk.co/mowasikuso/gchfjjd/4_pics_1_word_level_1100_to_1200.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/bG54X0M/96385872479.pdfIn PDF document text
    • https://cdn.sqhk.co/gusoguribus/Lgejhig/radujoropulapiwolo.pdfIn PDF document text
    • http://mists.space/buzzer_wav_fileqssrx.pdfIn PDF document text
    • http://static-get.top/bowen_mathematics_7th_edition_solution0rvr1.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/gateme/93982853866.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/xokakexiwesakonis.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/agrarian_reforms_in_indian_law.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/magneto_optical_current_transformer_seminar_report.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/80212490509.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/cibil_dispute_resolution_form.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_off0000f209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF209 5712 bytes
SHA-256: 084388b99716ac52b355781c1dbc6de8cbe18d0bc288946dba229b836c104783
font_01_sfnt_off00010580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10580 10828 bytes
SHA-256: 0f8a219a3f67c73548729ef07d47572f5533812417c3bded5bc92a07cf226985

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