Malicious PDF — malware analysis report

Static analysis result for SHA-256 13234bdad2b5ce98…

MALICIOUS

PDF

68.3 KB Created: 2021-04-02 01:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0341771f508b2171fa154dfbf2a1d49a SHA-1: dccdc224cb6e398bf4ceb21d96618298d2ba7b27 SHA-256: 13234bdad2b5ce9885fa8708053a725ac20dfb3bf57b53247f0f3b15ce6ad077
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 0.9998

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://botokaw.ru/123?utm_term=checkedtextview+android+selector PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418379/normal_5fcf684a8947e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471484/normal_602f3f1ae7003.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/hoe_beveiligd_afdrukken.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380674/normal_5fff36d011fc6.pdfIn PDF document text
    • http://rakamuxege.22web.org/encyclopedia_of_chart_patterns_por_thomas_bulkowski_portugus.pdfIn PDF document text
    • https://cdn.sqhk.co/manigonodapu/hc3hagd/encouragetv_full_movies.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/cgTgfjh/hunter_x_hunter_biscuit_real_form.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393019/normal_5ff6add2bb012.pdfIn PDF document text
    • http://rivepozepuxar.mywebcommunity.org/vekuguxedisasege.pdfIn PDF document text
    • http://sabumow.mygamesonline.org/dolibepu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403415/normal_5fd8b4512252d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://popuzavefigud.epizy.com/pedajadetij.pdfIn PDF document text
    • https://c534e673-b245-4a6d-8787-855fe96db707.filesusr.com/ugd/e19215_ee00b66adc7b49bba3ff94d81ed0f6ce.pdf?index=trueIn PDF document text
    • http://tifilumiteva.epizy.com/catalogo_avon_campaa_18_2019.pdfIn PDF document text
    • http://dogiwexor.myartsonline.com/kalavuxufafedewi.pdfIn PDF document text
    • https://6c9aa500-f8d9-42a6-b8a4-5b3c562bbfc3.filesusr.com/ugd/543886_15d17f53406241a29801058088d000e7.pdf?index=trueIn PDF document text
    • https://8ee4d174-735f-4cd7-9396-c3a65dbcc337.filesusr.com/ugd/5ac313_ff0381e318e84549b12a5661556929c5.pdf?index=trueIn 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_off0000cd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3B 5216 bytes
SHA-256: 0599ac8daf8bb5462a227509f2c34d6d742b701898047ebb7d7d5454c8fe8292
font_01_sfnt_off0000defb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFB 11020 bytes
SHA-256: 8ac96aa5cbde19fab686461d3a65f224b2dfa3c0307525e7183e0e1c78eaabde

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