Malicious PDF — malware analysis report

Static analysis result for SHA-256 42c3b4893fcaa275…

MALICIOUS

PDF

67.4 KB Created: 2021-02-17 23:38:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ca8070f7e7129ebb3e539d41dc6c06ee SHA-1: 7965c1236d1253862e759f63c62d7e90589bf9ef SHA-256: 42c3b4893fcaa275f2c109cb4d280326c1186d75eb4ac2c3ad9b000ae954ee04
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wix?keyword=elements+ions+and+isotopes+worksheet PDF link annotation
    • http://srakan.space/windows_7_activation_bypassku9p2.pdfIn PDF document text
    • http://ylyn.ru/58376845047dt4rg.pdfIn PDF document text
    • https://sitapiwagese.weebly.com/uploads/1/3/0/8/130814355/gasigositanoveb.pdfIn PDF document text
    • http://uscarins.info/xijanezudolipanazamuzajrkfp.pdfIn PDF document text
    • http://mklhhhh.space/sometemawolojukakixo923s.pdfIn PDF document text
    • https://cdn.sqhk.co/jigekuragige/ihLdig7/cardboard_cutouts_baseball_fans.pdfIn PDF document text
    • https://xujuwoxevosu.weebly.com/uploads/1/3/4/8/134896670/7414818.pdfIn PDF document text
    • http://biggymstoe.com/ponimosapuxusatuzaponet0c.pdfIn PDF document text
    • https://nalabusapigo.weebly.com/uploads/1/3/2/7/132740218/7292763.pdfIn PDF document text
    • http://itclick.info/liwimafoboranc7t83.pdfIn PDF document text
    • http://g2am2e.xyz/92646641417szblu.pdfIn PDF document text
    • http://small-italy.space/182177225589mvgj.pdfIn PDF document text
    • https://bipuvoru.weebly.com/uploads/1/3/5/3/135336843/3923539.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/bifadiwuwileji/dakaxutubiponujefezurolek.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/juniper_ex4200_switch_configuration_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_off0000cc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC87 5312 bytes
SHA-256: 0d3389c18828f73081b156deddca99ae33ce1a5f0be3c11265ec23c0a11cf453
font_01_sfnt_off0000de7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7B 10036 bytes
SHA-256: 1851e78dbb5fe356b82e6bb04771042b2207ff972d9088c11f15f3e0bada05ac