Malicious PDF — malware analysis report

Static analysis result for SHA-256 05824384bcb21029…

MALICIOUS

PDF

86.7 KB Created: 2021-03-22 18:42:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 84754579e7ce4096f492df54f7fca541 SHA-1: 23dd4ad9c12676d8be1e7213d8861cf3e6d64e6d SHA-256: 05824384bcb210296bdb04a34606cfb6a06e75777c7c7b04d6977a4826333b2b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=pe+error+in+lg+washing+machine+front+load PDF link annotation
    • https://laguwiba.weebly.com/uploads/1/3/4/7/134719839/wumagivadudeka.pdfIn PDF document text
    • https://rasazumeg.weebly.com/uploads/1/3/1/4/131454762/4338520.pdfIn PDF document text
    • https://cdn.sqhk.co/woxewoxe/ehbifnj/amines_nomenclature_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/gabudemudu/hhxlzif/femavobejija.pdfIn PDF document text
    • https://takojetomegupaj.weebly.com/uploads/1/3/1/3/131382497/saruso.pdfIn PDF document text
    • http://likujamozajowu.22web.org/zodixesigobezixufevu.pdfIn PDF document text
    • https://vepodiruwa.weebly.com/uploads/1/3/4/3/134374194/derafel_wijegu.pdfIn PDF document text
    • https://taxudomajifi.weebly.com/uploads/1/3/4/1/134108655/xigujoz.pdfIn PDF document text
    • https://cdn.sqhk.co/konumapedowe/igighgh/bukexisefopapaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zakunafu/the_developing_person_through_the_lifespan_11th_edition_by_kathleen_stassen_berger.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/enrichment_5-_6_mystery_mathematician_answer_key.pdfIn PDF document text
    • https://ba10d46a-d7c1-43af-8542-f1a50f31aa8a.filesusr.com/ugd/4dded2_cb50f590b14540139461579b3d946e40.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5797484a-46b7-4cdb-b3f0-adb377521ffd/sumewavexomasuse.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/3434740038.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/nizanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d181f313-807b-4383-a4fc-8554251b2346/susudixelezatoxixara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83968f8d-760a-41a0-8029-5a09b35f00da/nikon_prostaff_rimfire_ii_3-9x40mm_riflescope_-_bdc_150_reticle.pdfIn PDF document text
    • https://12c48f50-3553-44c7-a31c-19fc5df83d07.filesusr.com/ugd/7e0eb0_a7cf730164054b7bb814ebc03db82192.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kuxegu/98599261124.pdfIn PDF document text
    • http://muzizax.rf.gd/vertical_farming_guide.pdfIn PDF document text
    • http://kamabutexukawiv.rf.gd/76493455875.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39cba026-4b22-487d-b8bf-dbc1dabaa691/21_day_ultimate_reset_meal_plan.pdfIn PDF document text
    • http://jagupawef.rf.gd/voronekoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab0bdbe1-057b-4704-a006-83211d1ababb/80735992270.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001152a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1152A 5528 bytes
SHA-256: bca749e7171955ca975d06194b2432450a14f49509d6402019d795009549688d
font_01_sfnt_off000127da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127DA 10796 bytes
SHA-256: d84e844f952a3c00cac663cebe6917895e24df23c0677cfb22d38f80a6ab2e27

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