Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3e5993ba3bdd94…

MALICIOUS

PDF

81.4 KB Created: 2021-03-25 10:42:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ffed7cdbe3965a339e7d56d387095b4e SHA-1: 9ee9e9a4bdcd6ffb7914bf174ea4f89282a12ce1 SHA-256: ae3e5993ba3bdd9472959675202da9f73f42993eefb9bfcede0f97157397d23e
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 0.9996

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 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://xezojetit.ru/award?keyword=what+are+protected+areas+pdf PDF link annotation
    • http://tidirakozodawon.getenjoyment.net/xfinity_approved_dvr.pdfIn PDF document text
    • http://wiinorama.space/84698698745qhteo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445130/normal_6009d435c700e.pdfIn PDF document text
    • http://libertinemodels.com/43357508722wtlge.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/the_lady_with_the_dog_theme.pdfIn PDF document text
    • http://firobazotu.sportsontheweb.net/brideshead_revisited_free.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/karotemifodefawa.pdfIn PDF document text
    • http://fozixozag.iblogger.org/dejasozujuja.pdfIn PDF document text
    • http://pochta-24.cc/care_home_manager_salary_australia2drl7.pdfIn PDF document text
    • http://migimij.iblogger.org/pebirelifabiwuwulapez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_6034368a8f670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408596/normal_6057bd6a6ac4d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/free_calendar_template_2018_september.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70a5683a-8118-40d1-b0fe-6d9f0ac84c1e/80210148954.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/farmacocinetica_de_los_aines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e878e98-37a6-4bd4-a4e0-be2e3aa5823b/uppababy_vista_bassinet_waterproof_pad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5d851af-beeb-4560-94dd-2488f90df74b/viper_car_alarm_customer_service.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3607cc70-5d0e-450b-9656-ce2099c824e0/american_history_x_movie_download_in_tamil.pdfIn PDF document text
    • http://vagawujososoje.epizy.com/freedom_on_my_mind_book_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/64249096260.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27b96367-44c0-42be-8f1e-ac172c2aab93/8824606044.pdfIn PDF document text
    • http://gozipoxux.rf.gd/deponabogiwe.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_off0001007b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007B 5224 bytes
SHA-256: 8b403b5fcd25851a374c7e5e401894ec38aa05131eb2eae9aae9e1786a92cf3a
font_01_sfnt_off00011247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11247 11088 bytes
SHA-256: 71a28ff3c82778214ccd8864c92b4feb4406535a5ae67b016d3aab639d8539b0

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