Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5003dbd87bf3a43…

MALICIOUS

PDF

78.4 KB Created: 2021-04-27 02:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a0deacc154459d92af53f52c7a0b9e90 SHA-1: 35c52b1e1987338cc457897359b43001f22ae0fc SHA-256: d5003dbd87bf3a43c0aee4a46ae015721e57bc2141fdb935dcb46358ea043c08
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://druttle.ru/strik?utm_term=can+we+download+gta+5+mods+on+ps4 PDF link annotation
    • https://cdn.sqhk.co/norasoketika/ggJjfji/fifumomiweralozumikiti.pdfIn PDF document text
    • http://help-bluebadgecenter.com/nuzukk0s2p.pdfIn PDF document text
    • https://cdn.sqhk.co/pibepufas/8hbjjjh/6013495322.pdfIn PDF document text
    • https://cdn.sqhk.co/wefonasifaza/n6ghhiz/zed_runes_s10.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/KhfhjvG/mitchell_and_ness_swingman_jersey_fit.pdfIn PDF document text
    • http://kemytbok.xyz/machine_learning_with_python_githubach4b.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/Tc8zYcQ/ligivudosafuvezumisasox.pdfIn PDF document text
    • https://cdn.sqhk.co/jizuxadif/aUwUhbV/84582167238.pdfIn PDF document text
    • http://dkblogin-de.com/a_stolen_life_jaycee_dugard_free_dow8nwwo.pdfIn PDF document text
    • http://chatik85939775.fun/how_to_set_rings_on_panasonic_phonemk0gs.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzufoxo/DZfzifC/department_of_history_and_art_history.pdfIn PDF document text
    • https://cdn.sqhk.co/gabunufu/fghheSm/82015867481.pdfIn PDF document text
    • http://zuvalasit.mypressonline.com/rovimipiwite.pdfIn PDF document text
    • https://cdn.sqhk.co/duravukikemo/zuCXjae/discount_calculator_soup.pdfIn PDF document text
    • http://usechambre.xyz/877373323769zgxj.pdfIn PDF document text
    • http://zukoretevir.medianewsonline.com/audre_lorde.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/e0d69f7c-df94-4d63-bb36-e80bd95b3b3a/57786017775.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/teaching_assistant_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/proform_585_ex_wide_deck_treadmill_belt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93512255-665a-41ef-a307-2f2d53aaba4b/3dmgame.dll_gta_5_missing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b33330b-bb96-4965-964e-df1d8241c817/wheel_of_time_goodreads.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/70068527833.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_off0000f6ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CE 5392 bytes
SHA-256: 980a119621b5ab7327d3e8766af2719c5cac019599e7767209e9d3c4b90d02f4
font_01_sfnt_off00010932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10932 10292 bytes
SHA-256: 14f7effbe76099a0243adcad74e933247f1b86051c9c49402cd4414af75af00c

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