Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9125409f53833ad…

MALICIOUS

PDF

96.7 KB Created: 2021-05-17 00:37:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b55b4ee641d2fb233955cb94ceb7f7e5 SHA-1: 30b0215fa94cbf4e5e3f043a1a4c1a18c7f9b688 SHA-256: a9125409f53833ad4cfa66e8c4de70b841ea6d64899259ff814313098e433407
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/strik?utm_term=super+mario+bros+wii+u+world+2+castle PDF link annotation
    • http://wupidubame.mywebcommunity.org/asme_ix_welding_standards.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/what_is_a_trustee_job_in_the_church.pdfIn PDF document text
    • http://raisinshq.club/derecho_penal_romano_resumen0y6ju.pdfIn PDF document text
    • http://coolvdomaion.online/lafoprjh6r.pdfIn PDF document text
    • http://erogan-encolumbia.site/280878368555yxs5.pdfIn PDF document text
    • http://derifupiwa.mypressonline.com/gemuwatijexerivirulanunux.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/dcaebef7-76ea-4c14-ae48-d1c56ea0ba34/does_usps_deliver_on_sunday_for_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a279141-f7b0-4f33-8854-ac2eb77dbd3f/hearts_of_iron_3_wiki_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0153910-d8a9-4f11-83a0-cd92f627cbc6/26175903161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e6c2f30-0301-4056-8f39-463b3471b736/zenagajodiraminexuxevize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/064322b9-b464-4f9b-aeb2-c9cc300f9483/what_is_the_meaning_of_metaphorical_in_a_sentence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/871700ab-2cb7-4205-b5d5-e6b36a036467/nesudaxipopet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/017d1eb8-73c2-431c-b478-bdae2658a483/what_are_some_example_of_revenue_income.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/334eb4cf-fddd-4e8b-b971-f1c93779fd1a/51725802149.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/tutibo.pdfIn PDF document text
    • http://wizigipixe.atwebpages.com/90161593255.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/34915636730.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/19120915355.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/convert_byte_array_to_base64_string_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/bejowezono.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000128fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128FA 4792 bytes
SHA-256: c8886af870294417eb61ee0e3ad8a80e96e857c8f88a698659e89590c7a5940c
font_01_sfnt_off00013964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13964 5684 bytes
SHA-256: 9e53bc072be4141c404ee1dce976edd8c858dd3efa630a1733607cc41a37696e
font_02_sfnt_off00014cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CB0 12368 bytes
SHA-256: d8a2dc80056c2e53ae182c70ea4dee34eebf48549ce17078b620601701e7c4d5

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