Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c4b752606baa981…

MALICIOUS

PDF

83.1 KB Created: 2021-05-18 17:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0091fa1e4e0614557d4806c66f8d9e6c SHA-1: cc0114d17e745cd8fef0cbe81f2c1e39f7b38d35 SHA-256: 2c4b752606baa9818122041d32c40537a752fbabf8c3320f13832e97ec083e83
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 0.9992

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://leonvi.ru/strik?utm_term=fake+license+generator PDF link annotation
    • http://riwepetu.iblogger.org/68442814005.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427526/normal_5fdce185edbc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476127/normal_6041a866e9fa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487201/normal_6052d398ceb81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427523/normal_5ff447057d407.pdfIn PDF document text
    • https://lipefevek.weebly.com/uploads/1/3/1/6/131606222/wesefeduwoj_buwegasix_limuno_xokumetigefiwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408863/normal_60164ac6a9164.pdfIn PDF document text
    • https://likizosuzi.weebly.com/uploads/1/3/4/8/134886942/folikuruwobese_leviwawamu_mawunukizudine.pdfIn PDF document text
    • https://wiwamimojuwat.weebly.com/uploads/1/3/0/8/130813692/nujugubako.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/zunewidimem/photo_animation_software_free_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f6223ef-0e96-4fe6-baed-5c0056092566/sobadoselopawo.pdfIn PDF document text
    • http://kejarajavamoge.epizy.com/2261117851.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/how_to_tell_if_acne_is_coming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4bf4e15-3b92-46e6-9347-6bca0256869a/94316861771.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/49270923046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78fcea13-9619-4fd8-8774-23433e5cc208/ridgid_oscillating_edge_belt_spindle_sander_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34c510ca-b9a8-48ef-9fec-feb186016d82/how_to_improve_english_speaking_fluency_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a377745-eb95-44bd-a3fd-f80ea201eca0/nivodiraw.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/weliposop.pdfIn PDF document text
    • http://sudemididesiz.epizy.com/mijenipumimi.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/medians_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/26620397290.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/bolingbrook_police_reports.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B9 3048 bytes
SHA-256: 2a94f864512e4d89c98d35de33988299adf839706ed13603e0804af0450ab9c3
font_01_sfnt_off0001047f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047F 4984 bytes
SHA-256: 3aadbc1b71a1947c6fd1bf2366bdfc3ef6cf8aa8d7fdcf44835b6813f83b0b43
font_02_sfnt_off00011585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11585 12148 bytes
SHA-256: b60dde6e368f915ee2950df2ac848424fb63af350a1b6a1ea20227b6edf7f088

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