Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf9bfe27511cf0d…

MALICIOUS

PDF

280.9 KB Created: 2021-05-25 14:15:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: cf9c69b160122d2a8f15a2967840f43a SHA-1: b1f24e67f3d9b0c1b5241afc1be54ba5f3a35fdf SHA-256: 4cf9bfe27511cf0dd7caef2f3dc3a7326690d5e4032c94536bd04795e9c56abc
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection further support its malicious nature. The embedded URL, https://jottigo.ru/strik?utm_term=true+devotion+to+mary+summary, is the primary indicator of compromise, likely leading to a phishing or malware download page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8130

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
  • 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://jottigo.ru/strik?utm_term=true+devotion+to+mary+summary PDF link annotation
    • https://lawagupavuraxap.weebly.com/uploads/1/3/4/6/134616311/8e427255defc.pdfIn PDF document text
    • https://milajibejo.weebly.com/uploads/1/3/1/8/131871424/1656607.pdfIn PDF document text
    • https://xabisemegebo.weebly.com/uploads/1/3/4/4/134491474/tozamiwuxul_vijametemu_zajotewobekupo.pdfIn PDF document text
    • https://nusupubibirimu.weebly.com/uploads/1/3/1/8/131871553/f6c06398349b.pdfIn PDF document text
    • https://jolejijiwunepa.weebly.com/uploads/1/3/5/3/135334118/gurute_valer.pdfIn PDF document text
    • https://xozugovapotup.weebly.com/uploads/1/3/1/1/131164024/tijidipidamilapijawu.pdfIn PDF document text
    • https://dojukigefob.weebly.com/uploads/1/3/4/5/134577696/694435128e.pdfIn PDF document text
    • https://pegujugadul.weebly.com/uploads/1/3/1/6/131637136/fd0ea4aebeb8c9.pdfIn PDF document text
    • https://vizojifura.weebly.com/uploads/1/3/1/0/131070272/6286b.pdfIn PDF document text
    • https://sitoluvumoroge.weebly.com/uploads/1/3/4/7/134762666/e0c5177796a407.pdfIn PDF document text
    • https://linerebe.weebly.com/uploads/1/3/0/8/130813546/5cf362678.pdfIn PDF document text
    • https://kenodijegubiv.weebly.com/uploads/1/3/4/5/134501598/tematogebabu_gepepogulu.pdfIn PDF document text
    • https://gimisezijumini.weebly.com/uploads/1/3/1/4/131453276/fijadejovemuf_rujegibere_gosel.pdfIn PDF document text
    • https://nimamadud.weebly.com/uploads/1/3/1/8/131856523/nuzedabirenawedago.pdfIn PDF document text
    • https://jobadenel.weebly.com/uploads/1/3/1/1/131164033/wodiveru_laledomezage.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/53300d82-8e6b-481a-959a-846e873df968/balloon_rocket_experiment_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5105fae0-6ef2-4049-add6-99228fc3b966/restaurante_don_juan_y_maria_cartagena.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/jajowonutogunidijekoduxoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f5d952-eec1-42e3-b6fe-24d8a806ffe9/venn_and_carroll_diagram_worksheets_ks2.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/alphabet_letters_tracing_template.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003c76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C76D 5048 bytes
SHA-256: 4f67542bd5c5c7405e1a025503963716a75645e539297c8156d82b31cecd9178
font_01_sfnt_off0003d889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D889 3772 bytes
SHA-256: e2c7bb3c6d2fbc6b9680c858ce58af9e5cd0e4fbc18f33bdd2ad1d5654d08a87
font_02_sfnt_off0003e42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E42A 5600 bytes
SHA-256: 8ff3f8b6e45810457907f716a7ebaa1c8ecfbb2fd3c1e8087f4a87ad0029353a
font_03_sfnt_off0003f71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F71C 16616 bytes
SHA-256: b2d9d290934646bb6400f4f98361a1259368b9cb16f9a6afe62b5018cde893a2
font_04_sfnt_off0004277c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4277C 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7
font_05_sfnt_off00043c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43C50 6584 bytes
SHA-256: 2cb32547954073ec203492c29de50327998d2b08a53019149d2f29df890904e7

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