Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6cc67615f095fe2…

MALICIOUS

PDF

73.6 KB Created: 2021-05-25 00:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 34fcfd93735e2970e6b465a0ae6303e4 SHA-1: 2b93b579694aa13188dd2eb8fe89698a42ca6619 SHA-256: c6cc67615f095fe21feab00bf88d4a548c2ab3c17cc003e8d7a463c1dfb3cb3f
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-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.
  • 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://gimoguvi.ru/strik?utm_term=download+khulasoh+al+madad+an+nabawi+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370307/normal_6054adefd802b.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/24cbfa6f89051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368496/normal_601b8ed8dd3db.pdfIn PDF document text
    • https://kupajozowujuz.weebly.com/uploads/1/3/4/8/134881722/9410405.pdfIn PDF document text
    • https://tonulaluxi.weebly.com/uploads/1/3/4/0/134099082/3494455.pdfIn PDF document text
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/a15614.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481828/normal_5ff0733bbdb1b.pdfIn PDF document text
    • https://resodafuwagolip.weebly.com/uploads/1/3/4/3/134313475/7672466.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403141/normal_5ff543657e784.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/ronatiduzoxij/how_to_become_a_certified_medical_interpreter_in_arkansas.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/wuxevekumoj.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/source_game_engine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c19495e-afe5-47fb-b520-d3edb71a2194/kumiwisevenifikalodoraxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97adb2dc-df27-44c6-80cb-447d2f5aa329/9822408579.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/how_to_remove_rear_window_decals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd604aeb-a3bc-468c-856a-68def1e56392/jokulubuvuxej.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/alien_3_full_movie_480p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c14389d-f3d2-412b-8f17-4f9d325bf20a/volume_of_prisms_cylinders_and_cones_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0891ee09-9834-422b-b226-fe85f62a6bfc/what_is_the_difference_between_a_relation_and_a_function_in_math.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/79293378725.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1698ff55-d52b-4e96-82a8-7c5da167acf2/pirates_of_the_caribbean_1_full_movie_in_telugu_online.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/how_to_check_math.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea3cb4e6-5b70-4e24-b6d6-76c596f5db83/traduo_da_musica_7_years.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/yiruma_piano_sheet_river_flows_in_you.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/33363541103.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_off0000dd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4B 5480 bytes
SHA-256: 480ea49a3338c8d76bb4d8563a67e2d624122d436e7cf9056e2b9e3db5141643
font_01_sfnt_off0000efdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDF 11620 bytes
SHA-256: f79ad8b45f0741dc36b83b0fc1b16f817ffe64fe69d0cf7c7165ea6552a20b40

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