Malicious PDF — malware analysis report

Static analysis result for SHA-256 43522fc68dd06a64…

MALICIOUS

PDF

78.7 KB Created: 2021-03-19 06:39:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 479e2fa0106a32f61951ede3c33edfe8 SHA-1: 51c50948cb68d37c9323ad25098894fd1fc81ff2 SHA-256: 43522fc68dd06a648da944e9578e65ce580a6555a6134adb5d26576dbf52709b
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 0.9998

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://zajinet.ru/123?utm_term=mass+effect+andromeda+liam+romance+guide PDF link annotation
    • http://instapriz.online/methods_of_data_analysis_used_in_social_psychological_research492nt.pdfIn PDF document text
    • http://antonioita.fun/how_long_it_takes_to_learn_visual_basicuocxe.pdfIn PDF document text
    • https://vakonawokedoze.weebly.com/uploads/1/3/4/5/134522954/abf9b47a475306b.pdfIn PDF document text
    • http://ruszaimclub.ru/how_many_forgotten_realms_books_are_there2whhu.pdfIn PDF document text
    • https://vuzejugusu.weebly.com/uploads/1/3/4/4/134486163/mosivaxuwijep.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/b10a3b5eb6093bc.pdfIn PDF document text
    • http://choosemadam.site/31796562503yg8v9.pdfIn PDF document text
    • http://lestyprin.online/nirinezepesifodalo2j6a0.pdfIn PDF document text
    • http://quickpapp.online/74695666729hlhfn.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/zesixefe/bed_sheet_supplier_in_jaipur.pdfIn PDF document text
    • https://78bdfa25-736e-4945-a764-db21511aacb9.filesusr.com/ugd/9bd82e_54429962dbb949fda752157293c9f88c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/30c7623a-7d7f-4368-bc65-d8c65d03c361/big_little_lies_season_2_episodes_recap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/521cf893-a75b-4039-94c7-d03f3825bc68/vinikenoratubanuteruz.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/c_i_d_daya_photo.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/22998377287.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/68083112209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/805db12d-0b02-4bfe-986f-9c97fe47cb49/mugusemokodazebejutaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/vologezusikegorap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a7ba4fd-372e-4a5c-a591-93c5751c6dac/15419420253.pdfIn PDF document text
    • https://54570836-76ea-4100-b78f-d1ba4c3cc0d1.filesusr.com/ugd/21ac59_027321b0c2d44820943b9d958ba81bcf.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF436 5344 bytes
SHA-256: 6072417f92268550b40d2b094b2515ae856246243eee938d4aeed6e6b5ab41e9
font_01_sfnt_off0001065b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065B 10988 bytes
SHA-256: 9bbebda44a9c9ea3243037634d713e7ad1f89e7908853067a987869b6099409d

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