Malicious PDF — malware analysis report

Static analysis result for SHA-256 28398745b86aef61…

MALICIOUS

PDF

74.5 KB Created: 2021-02-27 23:07:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 569c431c0886b547d9cc31888ac01ca6 SHA-1: 4e383a7311b8f5f6f9c55d2ee1f7d83da318d8f9 SHA-256: 28398745b86aef61140e11356a443cdef553cae346714d08ed10c706b1c1a938
214 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to malicious infrastructure, disguised as a movie download. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lead the user to a malicious site.

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
  • 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.
  • 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=the+devil+wears+prada+full+movie+free+download+480p In PDF document text
    • http://bewewafip.scienceontheweb.net/delta_childrens_bentley_4-in-1_crib_chocolate.pdfIn PDF document text
    • http://mirijesuwakug.sportsontheweb.net/echo_srm_225_head_diagram.pdfIn PDF document text
    • https://nodekisoguzila.weebly.com/uploads/1/3/5/3/135313862/vufidowakotirar_paxuka_fafibamurebuv_rowaje.pdfIn PDF document text
    • http://zogometemo.sportsontheweb.net/23943196137.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/susonanezaj/bosabilogavezi.pdfIn PDF document text
    • http://rojanesifilagu.myartsonline.com/how_to_replace_golf_buddy_voice_2_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/gufuximodunomun.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/the_travelers_gift_seven_decisions_that_determine_personal_success.pdfIn PDF document text
    • http://fubavinexazixo.onlinewebshop.net/are_vox_amps_good.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/chicago_style_in_text_citation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/76632204915.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/32131592372.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/dasugumebife.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/ximavodidepotewoned.pdfIn PDF document text
    • http://dukinudoxitisat.epizy.com/tifuxirig.pdfIn PDF document text
    • http://fobuzepiru.epizy.com/colonic_polyp_management_guidelines.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_off0000e26b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26B 5808 bytes
SHA-256: 54208035df8e187514195d04b91f6dffe7ebfaf8b3e7ce67137b627fb18a4d17
font_01_sfnt_off0000f61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61C 11732 bytes
SHA-256: 9699b49684c44f4dbd40b22b157d29968a3bf45ba6219609f66791478aed5866

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