Malicious PDF — malware analysis report

Static analysis result for SHA-256 45c7370e88198db8…

MALICIOUS

PDF

76.3 KB Created: 2021-03-05 18:52:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 444c4c20aaf0d1e5b669c9bf498b605c SHA-1: 07fb6b1087f7f7badd6438df31189ece391cb802 SHA-256: 45c7370e88198db8e665741e71a9cad7d048745f82bc7ee5baebd4c340840f25
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain keywords related to trampolines, suggesting a lure. The presence of numerous external PDF links further supports the classification as a link farm, likely intended to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wb?keyword=skywalker%20trampolines%2015 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vesavakiri.epizy.com/xigufikedaretano.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/how_do_i_access_my_icloud_account_on_iphone.pdfIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_7eb107ada9374b3bba197cf1deb50f87.pdf?index=trueIn PDF document text
    • https://636e06b3-920c-4898-b827-ef778bbbc101.filesusr.com/ugd/40512e_975953f2a9ec49c5a40712eb756a9ef4.pdf?index=trueIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_a4d6daa49fec40a8a771f5e17cc126b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivamubug/functions_of_nouns_worksheet_with_answers.pdfIn PDF document text
    • https://e1cd7dcf-8988-4be8-9b1a-722367337987.filesusr.com/ugd/6203b9_373234db6b684bf1881f08d1f45c49c3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbac79d6-f95b-40f2-9914-219281f7ada2/xezoritexowogajasev.pdfIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_04c596f2c2bb45ad94dc5b69d3ed9b1a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e3c5b0e-8168-4d4b-8dec-66a826b2457c/kenosuvugegijap.pdfIn PDF document text
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_7a736ab7a45340509a7da0bfd50e5ca8.pdf?index=trueIn PDF document text
    • http://weforonezanofo.epizy.com/wunuxeraxitareliwoku.pdfIn PDF document text
    • https://e26dc784-fa46-4601-9f6d-57686faaf216.filesusr.com/ugd/c66525_dc7733a9c9594c4883bcd4db6dbd9db7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/canada_tourist_visa_application_form_5257.pdfIn PDF document text
    • http://ruludamena.epizy.com/69497633173.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/baumanometro_manual_farmacia_san_pablo.pdfIn PDF document text
    • http://worined.epizy.com/hierarchy_structure_template_ppt.pdfIn PDF document text
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_923dc8fcb2ed4f97986e45184b3b0fc1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/61802358205.pdfIn PDF document text
    • https://436240a4-ef10-404e-ad90-c5cab949c7af.filesusr.com/ugd/3fb742_fba36c7d85724981ba4f6e3d7f642e04.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/zipivitugafa.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/nafimelifulapo.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/sokodebeduxi.pdfIn PDF document text
    • https://da6a6a96-7907-4aac-bfe3-592928b14ca9.filesusr.com/ugd/39e844_5fbb586dead646e48d8518f87f8d749b.pdf?index=trueIn 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_off0000ec1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1D 5952 bytes
SHA-256: 6b0251791d4905cd232a0de29c789c286a24aaf3938ded2c01aecb4340c6d030
font_01_sfnt_off00010071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10071 10224 bytes
SHA-256: 342671abc557373d463b5e026ff4c408fe058f337754ebc7f22bfc0d7596c3b1