Malicious PDF — malware analysis report

Static analysis result for SHA-256 9966b89c64dd526a…

MALICIOUS

PDF

84.6 KB Created: 2021-03-17 03:42:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c3241211e9b9fd4f3c057ceaaced6c40 SHA-1: 738d66e202ff27c2ec26a254a8b3d6637b425952 SHA-256: 9966b89c64dd526a70f8fb7f2c3b012bdc7ee23739c2ccd314fddcd16d0ecacd
204 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a phishing lure, specifically using SEO tactics to redirect users to download sites. The presence of external links, including a link farm and a redirector URL, strongly suggests a malicious intent to deliver a payload. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/strik?utm_term=adobe+premiere+pro+free+text+effects PDF link annotation
    • http://mamontov-net.cc/votunivosemajedizulgqgtw.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/ladurasobivetinopo.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/best_android_phone_under_10000_4g_volte.pdfIn PDF document text
    • http://fipagolanikobax.mygamesonline.org/what_are_some_sight_words_for_kindergarten.pdfIn PDF document text
    • http://runmasten.online/ejercicios_de_nomenclatura_de_oxidos8n1u3.pdfIn PDF document text
    • http://tikanaw.mypressonline.com/marriage_and_morals_in_islam_sayyid_muhammad_rizvi.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/sonumivozuwotavovexid.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/convert_outlook_calendar_to_file.pdfIn PDF document text
    • https://cdn.sqhk.co/vufisolepu/XdIGNSg/rutew.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/kexivejejiven.pdfIn PDF document text
    • http://flylovel.com/359554895681yb39.pdfIn PDF document text
    • https://liberiloro.weebly.com/uploads/1/3/4/5/134589576/4846598.pdfIn PDF document text
    • https://cdn.sqhk.co/jenojigise/V2WEcig/58574701403.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/wodunoxoze.pdfIn PDF document text
    • https://cdn.sqhk.co/sekigizakeku/ihhbhde/easy_homemade_chocolate_cupcake_recipes_from_scratch.pdfIn PDF document text
    • https://cdn.sqhk.co/siganewita/jiicWhg/sopalalu.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/80250855227.pdfIn PDF document text
    • http://iciapp.xyz/wizard_and_warriors_3_nes_rom3xl59.pdfIn PDF document text
    • https://cdn.sqhk.co/novigigexuxo/J2hdcKj/how_a_falling_ball_viscometer_works.pdfIn PDF document text
    • https://warororob.weebly.com/uploads/1/3/5/3/135314520/418225c035ef.pdfIn PDF document text
    • https://juwomazitebuden.weebly.com/uploads/1/3/1/4/131414743/fd7be3d87a458.pdfIn PDF document text
    • http://smirno.life/bone_marrow_aspiration_and_biopsy_proceduresowdh.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://zuzopejorexa.onlinewebshop.net/waktu_solat_pulau_pinang_2020.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_off00010088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10088 4940 bytes
SHA-256: 60b4350bcf291af1a7776b1d28cd0c2e95bce0eb93608cdb9e699ca96c79f5a2
font_01_sfnt_off0001115a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115A 11084 bytes
SHA-256: fa91a8e415a8887005fbe5c2055f95ff93a0871265775f649b279b1889fcbce6
font_02_sfnt_off000136d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D4 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176