Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c9ed4f82103ca81…

MALICIOUS

PDF

91.8 KB Created: 2021-03-17 18:12:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1ef009fdaed9179831933da40cd85fa6 SHA-1: 227356a06aee4fb94a0141ddda72a9e89a8b0074 SHA-256: 5c9ed4f82103ca818cfdf512af49fca7d75030a0a6572fa49d81cb6f463442b5
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of an SEO link farm designed to redirect users to potentially malicious websites. The 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristics indicate a phishing or malware distribution attempt. The presence of embedded URLs and the ML classifier's high confidence score further support this assessment. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://lozipotod.ru/award?keyword=amphitryon+38+pdf PDF link annotation
    • http://fb-pageunderreview.com/82240082572d8cv2.pdfIn PDF document text
    • http://istlan.space/vans_old_skool_white_leather_black_stripexe2y6.pdfIn PDF document text
    • http://dirtygirl.fun/how_many_calories_in_a_medium_grape_slush_from_sonic1jhll.pdfIn PDF document text
    • http://volosaty100.xyz/25770032599f5emf.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/vebuwejezupidopodeliximem.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/street_fighter_4_arena_mod_apk.pdfIn PDF document text
    • https://tulaliferejuza.weebly.com/uploads/1/3/0/7/130775137/49b978890f75.pdfIn PDF document text
    • https://paninopuj.weebly.com/uploads/1/3/0/7/130739529/6243766.pdfIn PDF document text
    • http://qrastenmap.online/multivariate_analysis_logistic_regression_spss7yrdr.pdfIn PDF document text
    • http://autokenn.com/isrotel_beresheet_spar196n.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/giluzidapikepen.pdfIn PDF document text
    • http://gimepar.22web.org/bootstrap_form_validation_multiple_messages.pdfIn PDF document text
    • http://confirmationhelpcenter.com/wahl_clipper_corporation_addresslx6k1.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/59653687853.pdfIn PDF document text
    • http://roman-holidays.shop/14089465239yq4hm.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/jomexewuxibozepokamamagu.pdfIn PDF document text
    • http://satofaxa.iblogger.org/votetejop.pdfIn PDF document text
    • http://copyright-infringement.business/nubifakexebefudevikplue.pdfIn PDF document text
    • http://idealslimitalia-official.site/woraxinigetalaugvw5.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/static_ignition_timing.pdfIn PDF document text
    • https://sebanibukuj.weebly.com/uploads/1/3/4/3/134354661/1b6ab2c.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/62863818050.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
    • http://sawezigulafufa.epizy.com/uc_browser_android_2._3._6.pdfIn PDF document text
    • http://tarefipiv.rf.gd/cnbc_tv_news_in_indian_stock_market_updates.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013091.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13091 20784 bytes
SHA-256: cea88aca42063d8324ab4cbb65f35ed231313e239ff310ff51807c77157131a8
font_00_sfnt_off0000f822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF822 4980 bytes
SHA-256: cba957ce6f6997ef6b17e0621c56c4990cca425398f938919269b1e64c09f969
font_01_sfnt_off000108ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EC 12520 bytes
SHA-256: 703a4e6f5049395fca9e1102f6aac67e67eeec85b77a39772e9c8ca590f8c9f6
font_03_sfnt_off00015364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15364 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3