Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6e5736b24d4811…

MALICIOUS

PDF

73.9 KB Created: 2021-06-03 00:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cb40e9f38f64f799c28bb14e6762273 SHA-1: b7669023a41196c9e1d6dcacf1d858fb8574a367 SHA-256: 7f6e5736b24d4811e26e64a55b4324745ea5f94f82664bb4002d84a78920eb4d
204 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a link farm, ML classification, and ClamAV detection as a phishing trojan. The presence of a 'download button' lure and instructions for a password-protected archive suggest a social engineering attack aimed at tricking the user into downloading a payload. The primary URL, https://nomylo.ru/pbw?utm_term=miracle+box+2.58+crack+free+download, is likely part of this lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://nomylo.ru/pbw?utm_term=miracle+box+2.58+crack+free+download
    • https://static.s123-cdn-static.com/uploads/4368972/normal_5ffc839544575.pdf
    • https://kinijanara.weebly.com/uploads/1/3/4/5/134585029/7506152.pdf
    • https://monoxoni.weebly.com/uploads/1/3/0/7/130738852/bazamar.pdf
    • https://cdn-cms.f-static.net/uploads/4461748/normal_600db37d4562c.pdf
    • https://duxawedi.weebly.com/uploads/1/3/4/4/134477895/liferavuludasaz-jewesotisek-talosulivemo-zebedobezogi.pdf
    • https://static.s123-cdn-static-d.com/uploads/4377936/normal_60b61f3e29d66.pdf
    • https://static.s123-cdn-static.com/uploads/4416143/normal_5fceaf0ce22d5.pdf
    • https://vojoritus.weebly.com/uploads/1/3/1/1/131164067/zegexasufororasagubo.pdf
    • https://static.s123-cdn-static.com/uploads/4372105/normal_5fe3d86aaef2e.pdf
    • https://tozubovudifudi.weebly.com/uploads/1/3/5/9/135973827/dibopatebe-wifolofokuxe-denakul.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e2e94bab-b384-44ad-a63a-e94cf368ade0/70637030634.pdf
    • http://dipoziw.pbworks.com/f/24555575434.pdf
    • https://uploads.strikinglycdn.com/files/55976b58-dba5-4ae6-926e-78e4a4dc6d1e/inlet_guide_vane_function.pdf
    • https://uploads.strikinglycdn.com/files/9b539173-d66b-45bd-8442-fcb213717f50/how_to_take_fisher__paykel_dishdrawer_out.pdf
    • http://kolasotosexu.pbworks.com/f/sipigafe.pdf
    • http://kolelulu.pbworks.com/w/file/fetch/144417120/led_tv_service_manual_free_download.pdf
    • https://uploads.strikinglycdn.com/files/675b5d61-e4d3-42fe-8dc7-3efb1caee842/gepubijusinofero.pdf
    • https://uploads.strikinglycdn.com/files/bc520fb6-54dc-450e-9898-45abc781bfee/nozukufova.pdf
    • http://lagawiwefe.pbworks.com/f/maneras_de_amar_libro_completo.pdf
    • https://uploads.strikinglycdn.com/files/c84f5991-0224-477a-80d6-b46742e31cc6/54745990615.pdf
    • https://uploads.strikinglycdn.com/files/57626a0f-5934-4732-893e-e1690ce19476/pixegoka.pdf
    • http://xodelow.pbworks.com/w/file/fetch/144452175/18160438270.pdf
    • https://uploads.strikinglycdn.com/files/839ea45e-f681-4114-a7a2-a71662389cac/40049953832.pdf
    • http://fatakalewene.pbworks.com/w/file/fetch/144521973/how_to_learn_tarot_cards.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_off0000e15d.bin
2e40bd1281a28ff69e54f9bd50223c669fd758b7fe4a247987469126c65a529f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE15D 5688 bytes
font_01_sfnt_off0000f4f8.bin
4e5baf5b5b4406ea33d7bdca6da85fa896c1c6d1ca7406bb4d9b495f7eb0da6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F8 10792 bytes

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