Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c29ff1bbe0ed998…

MALICIOUS

PDF

81.5 KB Created: 2021-03-20 07:24:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7a070d5999a9f339cec6dea14fcdfa21 SHA-1: 4e9627daea00ecb492d1bcd86f7fef822eff4d42 SHA-256: 4c29ff1bbe0ed9986bfda7fd41c8f0d5b38f962aff72ff500efd1fedd902dc28
196 Risk Score
Tags
free-cdn-ebook-manual-lure

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 trick users into downloading a print driver. The primary URL, 'https://xajibur.ru/strik?utm_term=kyocera+print+driver+installation+on+windows+10', is an SEO redirector that likely leads to a malicious payload. The PDF also contains a link farm with 30 external links, further supporting its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/strik?utm_term=kyocera+print+driver+installation+on+windows+10 PDF link annotation
    • https://novazoneb.weebly.com/uploads/1/3/0/8/130814043/2e7fe6a3f8ab6.pdfIn PDF document text
    • http://vashmaster.info/tojawix44o8o.pdfIn PDF document text
    • https://cdn.sqhk.co/dodiniwotud/T7ymcpV/samsung_level_box_eo-_sg900_manual.pdfIn PDF document text
    • http://lnstagramcopyrightmanagement.com/how_to_use_canon_sx540_hsz5ujr.pdfIn PDF document text
    • http://qlemelest.online/baritibaguvilujevufk36m6.pdfIn PDF document text
    • http://gloslides.com/poletodefuteplvcj.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/5lhhbfh/33660807458.pdfIn PDF document text
    • https://lijowuvum.weebly.com/uploads/1/3/4/6/134624244/68d80.pdfIn PDF document text
    • http://magnitoli-2ekran.site/gramatica_ingles_ejerciciostof0e.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://uploads.strikinglycdn.com/files/bafea769-4899-43b1-9120-8337a392cf96/55613931928.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/k_v_pendharkar_college_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/gibinumumis.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/tozolivujoz.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/sims_4_update_december_2020_mods_disabled.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/luxusaxikikazezil.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/70829818132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae57ce4a-928a-45c8-9cb8-d6e4e46a3a3d/37662572923.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/zoviferirasatoju.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_off0000f4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CD 5272 bytes
SHA-256: 164f4124b5c786772a94eb9a1e926e601c96fa2087c3d9933735df76f1e73ab8
font_01_sfnt_off000106dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DC 10332 bytes
SHA-256: 2fbe9930db6ce05476c4e197bb61ea747a4958273629eb1e1622502e1374a77d
font_02_sfnt_off00012a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A4A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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