Malicious PDF — malware analysis report

Static analysis result for SHA-256 6476cf7fc7143582…

MALICIOUS

PDF

100.8 KB Created: 2021-04-11 23:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac31fa7486a8c50e84a90ee1a1db8c42 SHA-1: 9203867c270f6215302ade6de81be820e89b9a4f SHA-256: 6476cf7fc714358251b661c7e700794996fe122ee002fc80f999db9ec549dd8d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits characteristics of an advance-fee scam, including language related to lotteries, prizes, and parcel delivery. It contains a large number of external links, many pointing to PDF files hosted on link farm domains, suggesting an attempt to drive traffic or distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://seumenha.ru/strik?utm_term=how+expensive+is+it+to+heat+a+house+with+propane
    • https://cdn.sqhk.co/livatunozasu/FCTrhgv/mont_rushmore_deep_purple.pdf
    • https://cdn.sqhk.co/jefapukawore/dhierAA/46508810496.pdf
    • https://cdn.sqhk.co/wemitupu/sjhgchd/wosojigabewebi.pdf
    • https://bimovuwun.weebly.com/uploads/1/3/4/7/134727863/17a7d.pdf
    • https://cdn.sqhk.co/ranotigu/ekMjPjf/48888083293.pdf
    • https://cdn.sqhk.co/mobirewin/MYgckhe/monster_crafts_for_toddlers.pdf
    • https://fetubuka.weebly.com/uploads/1/3/1/3/131379928/towokenujuva-zozulopolubosig-jewafi.pdf
    • https://cdn.sqhk.co/gutipefu/Ahbgiii/japirewuxenegadolezejaka.pdf
    • https://robiwadanojiso.weebly.com/uploads/1/3/4/6/134644007/7493474.pdf
    • https://jasefeneg.weebly.com/uploads/1/3/4/4/134489721/9000543.pdf
    • https://bifezogutagu.weebly.com/uploads/1/3/4/5/134598372/mebifirikixozek-mupozigika-dogaxalarepini-komijivu.pdf
    • https://cdn.sqhk.co/bubiwalifeda/hegcgcy/strawberry_shortcake_puppy_palace_free_game.pdf
    • https://kuwuxegizeduki.weebly.com/uploads/1/3/2/6/132695805/babiduxi-rumak.pdf
    • https://feposogasutam.weebly.com/uploads/1/3/1/3/131384530/fba034.pdf
    • https://cdn.sqhk.co/libuzewis/iohdtic/hd_wallpapers_1080p_download_for_mobile.pdf
    • https://jedifubebevaze.weebly.com/uploads/1/3/4/8/134873515/ditube.pdf
    • https://cdn.sqhk.co/zosaremarebi/cawjhic/nuxivugakirizor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/496d4ae6-8a1f-482c-af19-03d8545bfc49/24821052794.pdf
    • https://e8677ced-6330-435e-8237-200fb10408a4.filesusr.com/ugd/a4c1fa_a747a041ce60449397b35983244ac97d.pdf?index=true
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_4c817414d2a1496f8d6e8f6a037760e8.pdf?index=true
    • https://29ca30ec-7ad4-487f-8637-d2d67f3a323c.filesusr.com/ugd/10b11f_5e04d87fb3b942978427fac87ee34a43.pdf?index=true
    • https://uploads.strikinglycdn.com/files/972b2dd2-54a3-406f-8e88-b1abfc8a8693/74383594124.pdf
    • https://uploads.strikinglycdn.com/files/3727f33e-5caf-40ec-89f0-ef802985a95e/kubota_bx2370_specifications.pdf
    • https://uploads.strikinglycdn.com/files/8ac0460d-36e2-4ea4-9c00-f9911c898820/31077426267.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014c56.bin
9f76130542ff531ab20b4664d4e7b75a4a9b5f0d5f5841622bb985a6e5442bd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C56 5056 bytes
font_01_sfnt_off00015d99.bin
7e4e5a895a1ccd60ede10da7d5aa27f5ebb824f305bd7049e2dbfc7be73ecd43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D99 11732 bytes

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