Malicious PDF — malware analysis report

Static analysis result for SHA-256 2632aa09ce626ff6…

MALICIOUS

PDF

73.7 KB Created: 2021-03-14 15:18:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a780aa06749e4fa9d40df7895902b39b SHA-1: 80e161499aba8d2f6938ae07ebf28c1b45c9fca5 SHA-256: 2632aa09ce626ff650ddaf1239ba957b43fddff3b0d583194e289ef484e496bd
254 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and an SEO link farm, pointing to a phishing or malware distribution scheme. The embedded URL 'https://crophysi.ru/award?keyword=imovie+storyboard+template+pdf' is identified as a malicious redirector. The presence of numerous PDF links suggests an attempt to manipulate search engine results for malicious purposes. Although no scripts were extracted, the PDF structure and linked URLs strongly indicate a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/award?keyword=imovie+storyboard+template+pdf In PDF document text
    • https://gososeru.weebly.com/uploads/1/3/4/5/134597059/moniwuxoxopexi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415525/normal_6040e84399d39.pdfIn PDF document text
    • https://zobegutibeg.weebly.com/uploads/1/3/4/9/134902349/gakemulimutan.pdfIn PDF document text
    • https://saferuwakuzav.weebly.com/uploads/1/3/4/6/134688645/3ceb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475852/normal_6044711a5bb88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413345/normal_5ff689b34b758.pdfIn PDF document text
    • https://zodazapel.weebly.com/uploads/1/3/4/5/134511258/tinogiwadil-monekasa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/18f13885-0338-40ef-a363-5cca65299edf/life_fitness_elliptical_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/dividing_fractions_examples_with_answers.pdfIn PDF document text
    • https://e0f910ba-f4aa-4d6b-87f6-24d78cda99ab.filesusr.com/ugd/cc15ef_85826436aec4435d8eed3b25110731fe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc196f67-91d7-400d-bd0a-ebab9298e194/how_to_start_a_songwriting_career.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/34946661866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e8bbda6-be98-4b04-85e6-83e696f1ebe5/calories_in_taco_bell_chicken_soft_taco.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/lexegedazagugozozonibiz.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/darwin_origin_of_species_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/71964652463.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/annex_14_icao_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ac5030e-2099-423b-a586-e916386f737f/what_is_quantum_software.pdfIn PDF document text
    • https://5e024257-ca51-40df-b6b5-a3104c7b7124.filesusr.com/ugd/97368a_f5838d2cce2c470c9a30ee3c2e712165.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/feziko.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/42976876219.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_off0000e464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE464 5424 bytes
SHA-256: 18197830d86f6fc5c11f054e6588f573043c97733e7035ccd1117e308a3d7bf0
font_01_sfnt_off0000f6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C6 10196 bytes
SHA-256: 2c4bec69fbfe21192f3990de2c02ade1c7d6a5ca36db1442c8820addbf669f4b