Malicious PDF — malware analysis report

Static analysis result for SHA-256 c08a21d0961389f2…

MALICIOUS

PDF

76.0 KB Created: 2021-03-31 00:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9f37dec3c967406537064cedb842c068 SHA-1: 90cb8912154cc474e25337056dc148bd5006b419 SHA-256: c08a21d0961389f2a2725afc4da79884f410a4ce08b5b029db75a97255d491e5
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 0.9993

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://soxebez.ru/strik?utm_term=best+modern+calligraphy+set+for+beginners PDF link annotation
    • http://se-mrush.com/71770436848yg5re.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/pukiregepesiviju.pdfIn PDF document text
    • http://filanion.online/rukepaxozunidifiiunfo.pdfIn PDF document text
    • http://luxisulejoxo.getenjoyment.net/vokugumalolami.pdfIn PDF document text
    • http://erogan-columbia.site/diary_of_a_wimpy_kid_2010_full_movie_downloadv0owr.pdfIn PDF document text
    • http://kevekozulanilim.sportsontheweb.net/nigipa.pdfIn PDF document text
    • http://onlinetiser.website/887672540794yn81.pdfIn PDF document text
    • http://vosalax.22web.org/foguvexafofogadu.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/51618656736.pdfIn PDF document text
    • http://tanubujurutemut.scienceontheweb.net/94512251276.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_7bf3c0dbd3eb4b36b292db6d57065ec4.pdf?index=trueIn PDF document text
    • https://dc273c12-e125-4738-b2e6-b96bc4bd5eb7.filesusr.com/ugd/c8df25_e92f4f934e2a408a9c866ad43ae533d4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/db2c120f-03cf-4e29-8093-dce41b008d2b/as_bill_sees_it_page_136.pdfIn PDF document text
    • http://notewewagegev.rf.gd/19858731642.pdfIn PDF document text
    • http://pumifaxiko.rf.gd/48282326019.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/chick-fil-a_nutrition.pdfIn PDF document text
    • http://suruliloxapesas.myartsonline.com/35333282744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d92e230-f929-454c-b103-1b972d2118e4/86739896919.pdfIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_f34defd625fa40a5954d31b8d4e1d340.pdf?index=trueIn PDF document text
    • https://584abdf6-e408-48d3-a53c-4313a8f82471.filesusr.com/ugd/18ee90_bee7e6312e3f43e4b0e6b92ebc0b2fac.pdf?index=trueIn PDF document text
    • http://rozibata.epizy.com/el_cristo_viviente_libro.pdfIn PDF document text
    • https://4b5f4e46-8b81-4257-bf39-61fc08ba57b0.filesusr.com/ugd/7ea8bb_a1ad56d5c3b74d9abc05acc2da590954.pdf?index=trueIn PDF document text
    • http://xiburebejevikom.rf.gd/52049451159.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95C 5860 bytes
SHA-256: af03fa014aaa46ec3cf6535ce1cabb4083ba073bc6831b0f07e970308712d664
font_01_sfnt_off0000fd31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD31 11028 bytes
SHA-256: 061d63e627e1f8f0bba42d55056662d8a46f4a832029ed0f5e03842657479f08

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