Malicious PDF — malware analysis report

Static analysis result for SHA-256 41791d88ad9195b1…

MALICIOUS

PDF

64.0 KB Created: 2021-04-04 00:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8782d6837e476936f6be672643aa4641 SHA-1: 791934d08cf92f7dab6f52e7f641ffcddb0e4633 SHA-256: 41791d88ad9195b114fbc3fd5a0a50bbda4706561872e29dc9a37262be97bf0f
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.6571

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
  • 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
  • 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://jumiwimov.ru/strik?utm_term=the+night+manager+season+1+episode+5+recap PDF link annotation
    • http://buvalopexur.mygamesonline.org/31941563753.pdfIn PDF document text
    • https://cdn.sqhk.co/lexebogefaj/f5yibjd/sofijobezatamodunugu.pdfIn PDF document text
    • https://cdn.sqhk.co/zifuvifiweva/jjxtidK/train_times_newcastle_to_sydney_saturday.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/eHjhfnr/43710580880.pdfIn PDF document text
    • https://zedetebi.weebly.com/uploads/1/3/1/0/131070456/9140700.pdfIn PDF document text
    • http://niwopofe.scienceontheweb.net/the_raven_edgar_allan_poe_book.pdfIn PDF document text
    • https://xukoperupe.weebly.com/uploads/1/3/4/7/134743664/ranusamar-naguduro.pdfIn PDF document text
    • https://jukatuve.weebly.com/uploads/1/3/2/7/132741058/leruz-geverero-mekademomituzom.pdfIn PDF document text
    • https://cdn.sqhk.co/gobisofokox/sghiOjg/potion_recipes_skyrim_healing.pdfIn PDF document text
    • https://jarurozo.weebly.com/uploads/1/3/5/3/135320013/9943f66aa584c83.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/motu_patlu_cartoon_episode_3gp.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/vujeboga.pdfIn PDF document text
    • https://5a98ae10-8c7e-48da-b83f-9bcbc644cfa3.filesusr.com/ugd/9a8764_e6cee486834647bc8e8b4d3fa9d4986c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/whatsapp_status_video_hdvidzpro.pdfIn PDF document text
    • https://1c896d37-30d1-4b4d-9537-98f963aae812.filesusr.com/ugd/865d50_c397bf98017b463caf71b0c7f19eb65b.pdf?index=trueIn PDF document text
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_4bdef02c2b6f4c5684ee61ce882ef2f8.pdf?index=trueIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_c8bb0a45078e4c9d8de402de9c051114.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5d054bd-d258-46be-b62d-7cb21cbed502/how_to_calculate_the_average_density_of_earth.pdfIn PDF document text
    • https://bc260b4e-efc2-469d-9102-9c7234992d76.filesusr.com/ugd/b1b3ad_330127ef68fd4b1cbc3688bbdb6727aa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1197e39-d79b-4e7c-b4ba-f987586ece71/wojaxuripixubaletimuto.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/subogomi.pdfIn PDF document text

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