Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b12a3ae001e04b0…

MALICIOUS

PDF

129.0 KB Created: 2021-05-20 02:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 45406ceb1a6401b705fd1c2be15878d8 SHA-1: 8f94e76ee148b7f1abc09a3cb8e6b2c147d7adf9 SHA-256: 1b12a3ae001e04b05a3238fafe3d8ede350dc7809495712376ada085243079d9
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://bologen.ru/strik?utm_term=tamil+old+songs+1980+to+1990+mp3+free+download PDF link annotation
    • https://feloxoxux.weebly.com/uploads/1/3/4/0/134000485/sovebexuw-sidozoda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481673/normal_602e056101ab0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369671/normal_5ff56517100df.pdfIn PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/e7bc330ddc01e14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418167/normal_601816301ee5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502439/normal_5ff7575c33349.pdfIn PDF document text
    • https://nefufepaxesa.weebly.com/uploads/1/3/1/4/131453268/1106152.pdfIn PDF document text
    • https://virubavu.weebly.com/uploads/1/3/4/7/134755547/xokabunaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370263/normal_605028bd82252.pdfIn PDF document text
    • https://pufabakorulur.weebly.com/uploads/1/3/4/3/134320636/wuzevefu-podewido-xomitexowosega-togap.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/zafijukopa/picsart_premium_cracked_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/zafipubonejifurim.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/ton_b_album_nh_trn_facebook.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/3375498133.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/wopenusijisoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1408887-8a96-4cf6-bef7-ae46d10ab666/the_secret_garden_full_movie_watch_online.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/dumexuf.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/xuginetuxizaxifu.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/62127643977.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/hydroponic_planting_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec345067-ca4a-4fb4-86f5-e333d3070719/un_grito_desesperado_libro_completo_para_descargar_gratis.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001bd41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD41 6108 bytes
SHA-256: 608f8c8d71331413c9324301681f21af58204f0d9a87c4541a769a33ae19c575
font_01_sfnt_off0001d202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D202 11552 bytes
SHA-256: 5fea0aca836ac2c71c99c406b02d1deebc935dd67619d3b0f1c7df12a4808bb6

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