Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0758efaab3aea14…

MALICIOUS

PDF

76.0 KB Created: 2021-03-12 19:09:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58e79a62d210ebbbaad225daf298108e SHA-1: 55f5fec63eec72674c1ea9db1a56b91e7cc0eb04 SHA-256: d0758efaab3aea14782ae2526e6cf5f640ee3c4502574313129fd423ef13c1fa
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and potentially phishing-related. It contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or distribution mechanism. The document body, though heavily obfuscated, contains references to search terms and application installation, aligning with a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/aws?utm_term=how+to+add+apps+to+my+magnavox+smart+tv
    • https://cdn.sqhk.co/kawonidoza/jdjauwT/weather_nyc_celsius_10_day_forecast.pdf
    • https://cdn.sqhk.co/bexikerez/GZZGjc8/zarajasomopoti.pdf
    • https://lepepapiminokuj.weebly.com/uploads/1/3/4/4/134493398/b657e7d9759.pdf
    • https://cdn.sqhk.co/vomawoko/s4Dgcij/fabow.pdf
    • https://cdn.sqhk.co/bemaxopig/dhdjjDZ/sesirulesisunomekizalar.pdf
    • https://cdn.sqhk.co/zuzipogowita/fH1P4EX/gimege.pdf
    • https://nulepapilix.weebly.com/uploads/1/3/5/9/135957677/gibekodiz.pdf
    • https://cdn-cms.f-static.net/uploads/4419425/normal_60369e7d1f4d8.pdf
    • https://cdn.sqhk.co/jogeguzotire/gZdijgc/nejelajixalodosu.pdf
    • https://cdn.sqhk.co/wareberefiz/j0Fjh6l/prismstation_ac_datasheet.pdf
    • https://cdn.sqhk.co/muruwake/igjfhi5/38362636546.pdf
    • https://static.s123-cdn-static.com/uploads/4491426/normal_5fedc4c369c35.pdf
    • https://cdn-cms.f-static.net/uploads/4446374/normal_6028014089b2b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4f25ac9b-5b35-487c-82a0-29855722dbea/how_to_avoid_uti_after_sex.pdf
    • https://uploads.strikinglycdn.com/files/20f20649-f432-4a21-ab5d-b0c261e25101/vemajuvumatanuzewi.pdf
    • https://uploads.strikinglycdn.com/files/cd63ea15-dca2-40bb-9a57-6becf50b9896/what_does_77777_mean_spiritually.pdf
    • https://uploads.strikinglycdn.com/files/d23127f9-fd9a-4e42-b5d6-28f00a5bfa85/84269033676.pdf
    • https://uploads.strikinglycdn.com/files/12c60d41-0a18-458b-a3b3-33c919a8235f/parts_of_speech_exercises_with_answers_for_grade_5.pdf
    • https://uploads.strikinglycdn.com/files/beee182c-09ea-4c56-9fbd-bb52ff8ae78a/cuisinart_compact_juice_extractor_reviews.pdf
    • https://uploads.strikinglycdn.com/files/a06e74d5-913f-4c92-8a5a-8f614db9ba2b/runejugedesoxumipora.pdf
    • https://uploads.strikinglycdn.com/files/2c11c04e-f48f-40fa-99f8-dc4d858fdd71/99269151395.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecb9.bin
d92e7282b7ba5ea7eafc384a2082b79c5cd3cda9fbb52f0e0509170023146abc
pdf-font-stream PDF embedded font (sfnt) at offset 0xECB9 5528 bytes
font_01_sfnt_off0000ff99.bin
153d82deacc225196f033f6dbb8a7c0ef4678bb16d7d3faf710f34c86b0dbd7e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF99 10068 bytes