Malicious PDF — malware analysis report

Static analysis result for SHA-256 9992cb10422c1c15…

MALICIOUS

PDF

73.8 KB Created: 2021-02-23 04:00:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: eaf80fddf7d443a0d4e1a71cef487cbe SHA-1: 94dd0cf5b037ce3ca001ea0492d25b93a434dbb0 SHA-256: 9992cb10422c1c155e2b46bad1ed38b18e731fef9f56a46f41a030846067250c
156 Risk Score

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 0.9999

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://seumenha.ru/strik?utm_term=que+significa+la+r+peque%25C3%25B1a+en+las+marcas PDF link annotation
    • https://cdn.sqhk.co/lokabawopup/pbgehgM/xitumukoj.pdfIn PDF document text
    • https://cdn.sqhk.co/gagupedoxut/YFij6gc/elite_youth_hockey_camps.pdfIn PDF document text
    • http://expressday.online/bitter_kola_and_honeyl2u1z.pdfIn PDF document text
    • https://wojumujar.weebly.com/uploads/1/3/5/3/135396772/2627310.pdfIn PDF document text
    • https://kobafadovuzek.weebly.com/uploads/1/3/4/3/134311208/0a496c39917c02.pdfIn PDF document text
    • http://health-top.ru/wutukapifepotinesv7uys.pdfIn PDF document text
    • https://cdn.sqhk.co/rapaxino/hMih9gi/70642332394.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/Tjgiigi/scrabble_word_finder_free_games.pdfIn PDF document text
    • https://xitapazutirubej.weebly.com/uploads/1/3/4/8/134882608/bivik.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/mukut/zorafeg.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/new_bollywood_movies_filmyzilla_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/darth_vader_helmet_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/ashoka_movie_hd_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/dimokajofoxina.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/caitlyn_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/28_days_later_full_movie_free.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_off0000dc4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4E 5732 bytes
SHA-256: b4e86ec28511b1d1ba9c5f170a3758651466e1ade82cc2a85531114b0337aa42
font_01_sfnt_off0000ef86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF86 12672 bytes
SHA-256: e6d9a760e57009d31e77e703592402cb75f0d1f173c968ada7ea434a776835b6

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