Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e24c9126a18c9d7…

MALICIOUS

PDF

86.0 KB Created: 2021-04-02 18:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 456d3f2676b3a802e63245b82e83c24d SHA-1: d70af8dc9384ab038e279fe5a8fa8bf8cd8eefd0 SHA-256: 6e24c9126a18c9d74f2a0d78056edf7424a5c2ac57147ac693ea950e13117d2d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains a lure related to printer connectivity issues, directing users to a suspicious URL. The PDF was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and PDF_SEO_UTM_REDIRECTOR_LINK, indicating a phishing or SEO spam campaign. ClamAV also detected it as Pdf.Phishing.Trojan. The presence of embedded JavaScript, though not fully detailed, suggests potential for further malicious actions beyond simple redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/strik?utm_term=can%2527t+connect+hp+printer+to+network PDF link annotation
    • http://theporte.xyz/2019_camry_se_colorsk3erd.pdfIn PDF document text
    • http://getchambre.xyz/51253732724jkbl7.pdfIn PDF document text
    • http://centerbluebadge.com/888720845094we0z.pdfIn PDF document text
    • http://leaninrzpd.site/formation_chaud_froid_et_plomberiewit5g.pdfIn PDF document text
    • http://zewegirugiputix.22web.org/movimiento_uniformemente_acelerado_caracteristicas.pdfIn PDF document text
    • https://pufizemopuvagup.weebly.com/uploads/1/3/1/4/131407511/fatix.pdfIn PDF document text
    • https://jonimewogil.weebly.com/uploads/1/3/1/8/131860125/gomasijowuzematop.pdfIn PDF document text
    • http://summ-green.fun/vajuvivizarejazunelurenibzz7g.pdfIn PDF document text
    • https://petuxomurekag.weebly.com/uploads/1/3/0/8/130874153/kexili_luxanip_porakalepuk_refezatonineti.pdfIn PDF document text
    • https://riviruzo.weebly.com/uploads/1/3/0/7/130739493/1246474.pdfIn PDF document text
    • https://rixutabenenik.weebly.com/uploads/1/3/4/4/134498467/5bfbde5a795ed49.pdfIn PDF document text
    • http://maroron.22web.org/jumokerudawedukokitik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/buvez.pdfIn PDF document text
    • http://punegisegavugaf.epizy.com/82347342418.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/chrome_web_store_video_er_pro.pdfIn PDF document text
    • http://wulitebajanuba.rf.gd/pijukofebolafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96cebeed-832f-4e00-81c5-fa1cfc4235d4/nuzugafuzanovanidevabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5d9c23b-c5e8-47ea-8176-0fa9c8c7279a/91357627646.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/68583794778.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/3568000967.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/fibabujewimafazat.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/suredivekabeporinotowi.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/kezuvekigerenijijuzexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19f46367-9bf4-4fc5-b620-7d06f9d681bb/how_to_fix_short_cycling_heater.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/cd_cassia_eller_acustico.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/22655803551.pdfIn PDF document text
    • http://fofeparulofiz.rf.gd/dexada.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_off00011450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11450 4904 bytes
SHA-256: 4b1d1d1581490d9ce52390f389a441027bd93dae00fc12e05faf21da1824a865
font_01_sfnt_off00012510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12510 10892 bytes
SHA-256: 4a80967ce9e141b185dba8d025c82eb8dd85dd97022b5aa7e2eec1961a6a45b1