Malicious PDF — malware analysis report

Static analysis result for SHA-256 2438be8c66122176…

MALICIOUS

PDF

123.2 KB Created: 2021-05-24 02:12:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 62e38db7a8c5185048c758c873531da8 SHA-1: dd4e32fc91ab001d8ed2de5d6aa01c6f38500447 SHA-256: 2438be8c661221766a558800dc918e48fc5e9baf02e22002f8adce082a86be03
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to drive traffic to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs are indicative of a phishing lure, possibly attempting to trick users into downloading further payloads or submitting credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/strik?utm_term=marathi+typing+lesson+book+pdf PDF link annotation
    • https://wefupavoxed.weebly.com/uploads/1/3/2/6/132682659/4621987.pdfIn PDF document text
    • https://setixifofu.weebly.com/uploads/1/3/1/6/131606861/vejuzejejelagi.pdfIn PDF document text
    • https://livabawixegi.weebly.com/uploads/1/3/4/3/134320323/d0758b1.pdfIn PDF document text
    • https://xelipifexejup.weebly.com/uploads/1/3/4/8/134848770/wivirunu.pdfIn PDF document text
    • https://bolumuratojepo.weebly.com/uploads/1/3/4/7/134749128/930d788.pdfIn PDF document text
    • https://zolefixu.weebly.com/uploads/1/3/4/4/134432518/naganadaletapotew.pdfIn PDF document text
    • https://mogorabijeruli.weebly.com/uploads/1/3/1/3/131380728/e7e8ab55b7.pdfIn PDF document text
    • https://tokarakuwo.weebly.com/uploads/1/3/0/9/130969339/74704d.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pasutiz/full_hd_movie_evil_dead.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fc17b1b-df93-44e4-9ac7-1151900fb6a3/is_there_a_demand_for_technical_writers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24d6f219-62e1-4118-b81e-bcf3e90d916d/unit_circle_6_trig_functions_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa4675ac-be1a-4d11-9bbb-fc8e417ad7aa/what_is_relative_frequency_distribution_table.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/51075619928.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/watch_scary_stories_to_tell_in_the_dark_full_movie_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/88085183016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b30ba75-03d4-48d0-ae8f-24bdbfd9e568/96512181841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c2add24-eec7-4460-b778-529c7d9faaee/c.net_interview_questions_and_answers_for_5_years_experience.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c89f74-f7bb-4227-b016-51b43c749d55/oxford_style_shirt_fit.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/free_product_brochure_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/quadratic_equations_worksheet_class_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e5abc1c-d567-4eab-827c-3e590ee0d7d5/how_to_set_up_golf_buddy_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/maharashtra_mca_cet_2019_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/44628713016.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000185a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185A2 2684 bytes
SHA-256: 1dd6ffbc9d2114bfb61304dc196367bbe56ceaa614f5224348f3752054ba1dc0
font_01_sfnt_off000190ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190EA 5616 bytes
SHA-256: b1940fe200eff4a73abeebd2555058720b60676fa1aac865d14d020b44e12d0e
font_02_sfnt_off0001a418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A418 20868 bytes
SHA-256: cb42443929049562d93e22ebc9193931bcf7ed5aa554b311a50151d1bd3c87d7