Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ccf87d7b2a725a9…

MALICIOUS

PDF

83.7 KB Created: 2021-02-19 21:20:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 7c0ff8e9120ba6e24e250a7579f311d8 SHA-1: 96f5028a07c5c520aebd1f8f5d383b4157a5229d SHA-256: 5ccf87d7b2a725a9f17f18db769d566afd7e49f20bc9bed045ce0d57ee70e44f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. No scripts were extracted, but the PDF structure and embedded URLs point towards a phishing lure.

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://jottigo.ru/strik?utm_term=cuantos+milimetros+tiene+un+metro PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365562/normal_602d6a3ac4f74.pdfIn PDF document text
    • http://axecheat6.xyz/sustained_emma_chase_epub_download9a1q4.pdfIn PDF document text
    • http://cccckkkkkdd.space/guidance_value_bangalore_2018-19ncb8z.pdfIn PDF document text
    • http://pmaider.com/receipt_book_template8busb.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwoxebu/QnIgdAw/xawelolu.pdfIn PDF document text
    • https://cdn.sqhk.co/gidetixi/hc4lhfN/block_breaker_3_game_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/ehiihij/41809463774.pdfIn PDF document text
    • http://svoylend.xyz/domofisupigavabolakewilijye8ax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450430/normal_60054d2245782.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/cjaYCNl/guitar_sounds_buzzy.pdfIn PDF document text
    • https://cdn.sqhk.co/wemegofuk/Ihgiahb/jixezinufunowes.pdfIn PDF document text
    • http://apple-fruit.space/android_device_recovery_modeqlxwx.pdfIn PDF document text
    • https://cdn.sqhk.co/xizowabik/hpjbiiP/download_game_glory_ages_samurai_mod_apk_revdl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393483/normal_5ff866ec0a141.pdfIn PDF document text
    • https://cdn.sqhk.co/xolafunodo/WTjjYgi/miracle_city_2_mod.pdfIn PDF document text
    • http://mignonette.space/2100_classic_autoclave_manual8hvc4.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/x7gdPhe/likes_and_followers_by_popular_hashtags_to_get.pdfIn PDF document text
    • https://cdn.sqhk.co/mugukawi/Sd0jhjb/hero_xtreme_160r_price_in_kolkata_emi_calculator.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/8jja6ie/football_predictions_today_free.pdfIn PDF document text
    • https://cdn.sqhk.co/riwutosax/cCescic/pocket_informant_outlook_sync_iphone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F8 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off0000f1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1ED 4736 bytes
SHA-256: cc450c1904679b47f3b4ad1814453dccea101614e732c790c9dea3952bfe0499
font_02_sfnt_off000101e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E4 11992 bytes
SHA-256: 0a2a8a70f85b00fec9cbc955a4458a1d5169ada1eb740b7f8c43abd451f10c80
font_03_sfnt_off000128cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128CF 16304 bytes
SHA-256: 675029f1956b13e4e19dedcb802ef88d29960312ade531b018aeb51e2228e7de