Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ec579cbac32c4d…

MALICIOUS

PDF

71.5 KB Created: 2021-02-25 04:47:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: feb327ff2af24481d28203ddf4400523 SHA-1: 36a4901ae0cc2ddcc64ce66394d5f180033c583f SHA-256: a3ec579cbac32c4d3fedad23ec290a6908d7cd92d332ee48b8c66e0982fad017
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/wix?keyword=unblocked+hacked+bloons+tower+defense+3 PDF link annotation
    • https://varupeneg.weebly.com/uploads/1/3/0/9/130969993/3383022.pdfIn PDF document text
    • https://cdn.sqhk.co/nawakema/gjGhc1r/bouncing_ball_with_handle.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/jENhij9/cat_warner_tax_evasion.pdfIn PDF document text
    • https://mixunolonuwoja.weebly.com/uploads/1/3/0/9/130969204/7939946.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzaxepigi/g2GgXgj/f1_2016_mobile_requirements.pdfIn PDF document text
    • https://cdn.sqhk.co/livaxipovage/jfZjfL3/the_galaxy_survivor_apk_mod_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/Qid9jTS/iron_throne_defense.pdfIn PDF document text
    • https://semulojera.weebly.com/uploads/1/3/2/6/132695334/6181860.pdfIn PDF document text
    • https://vewudati.weebly.com/uploads/1/3/0/8/130873955/ganoniwalabu.pdfIn PDF document text
    • https://cdn.sqhk.co/janezewufaj/if61Vrk/gumabarebef.pdfIn PDF document text
    • https://tisogile.weebly.com/uploads/1/3/4/7/134728595/9068811.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bidusopevix.epizy.com/14693777389.pdfIn PDF document text
    • http://magelul.epizy.com/reportage_gilbert_chikli_sept_a_huit.pdfIn PDF document text
    • http://kuwoguki.epizy.com/39865879750.pdfIn PDF document text
    • http://vopapokolozanum.rf.gd/asa_guidelines_difficult_airway_management.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_off0000dbed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBED 5560 bytes
SHA-256: b9d9f46e94b585ee63ba6c4083d9e936ad5c6a4c8f32acd18a268ae459c36b49
font_01_sfnt_off0000eee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE9 9952 bytes
SHA-256: 5ae8d382a92f69f54b8a127a46624e63a3e316379c9078db7d235863d8fd3841