Malicious PDF — malware analysis report

Static analysis result for SHA-256 716c898110aebdbd…

MALICIOUS

PDF

77.2 KB Created: 2021-04-18 07:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 17027ab9540e6df3c1665afa5803072d SHA-1: e6b63416b41180f7e45f959b60a3b566c2fff33e SHA-256: 716c898110aebdbda1f91f2638d409b4decb2b4aeadf982ed84a5bfd932ef676
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/strik?utm_term=friends+like+these+star+wars+rpg PDF link annotation
    • https://cdn.sqhk.co/tomubozes/fgcbjht/free_get_website_traffic.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403959/normal_5fd823630e6f9.pdfIn PDF document text
    • https://cdn.sqhk.co/kevovevude/aPjijbQ/change_keyboard_mac_os.pdfIn PDF document text
    • https://cdn.sqhk.co/baresupujar/i8jbicF/soluvokimuridu.pdfIn PDF document text
    • http://bepifukikuku.mygamesonline.org/39061363630.pdfIn PDF document text
    • http://retapadu.medianewsonline.com/advertising_strategy_of_amul.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/DicTrhd/70946988113.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422620/normal_60183cdfbab37.pdfIn PDF document text
    • http://myyshooop227.site/game_dev_tycoon_best_combos_androidfr4ax.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxisilogok/z8Abeid/wigan_rugby_league_1995.pdfIn PDF document text
    • http://ladekepevij.mygamesonline.org/intermediate_english_language_test.pdfIn PDF document text
    • https://cdn.sqhk.co/xororofomed/4ghbhij/82416837150.pdfIn PDF document text
    • http://ludshop.xyz/naranja_mecanica_pelicula_completa_youtubealomy.pdfIn PDF document text
    • http://wosozage.mypressonline.com/synonym_dictionary_free_download.pdfIn PDF document text
    • http://maska-respirator.shop/the_desire_mapzvphp.pdfIn PDF document text
    • https://cdn.sqhk.co/gewewoturila/peidjew/48454100894.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fuvidokibet/xebopasejibe.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/ffxiv_culinarian_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/vancouver_self_guided_brewery_tour.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BD 5008 bytes
SHA-256: 48bee55fdd9358325bf2216f096173628745ab6d31c9d2a1a5027309af4e21b6
font_01_sfnt_off0000f3c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C2 11200 bytes
SHA-256: 666edcfa6f97e1d8a5f7a44f3ee2782fe6c03f6dab1cbc176d06307569442a59
font_02_sfnt_off0001194b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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