Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a842e1bb54add1…

MALICIOUS

PDF

81.0 KB Created: 2021-02-05 18:59:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a0665c0a5c2318b4deba15169c509eef SHA-1: 8e347a0b020bb3acbdf50e12dcd5b8aff4960423 SHA-256: 46a842e1bb54add145d4aa6b441c8d7d3c4f34b85ced1003bdc3a1e109fc50c5
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic indicates a link to known malicious redirector infrastructure, and another flags it as a PDF SEO link farm. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=beginners%20guide%20to%20bordeaux%20wine In PDF document text
    • https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/xudunur.pdfIn PDF document text
    • https://majuxakitififez.weebly.com/uploads/1/3/0/7/130738909/jazusixikumimemofal.pdfIn PDF document text
    • https://xefagopabori.weebly.com/uploads/1/3/1/3/131379938/0f4271d30.pdfIn PDF document text
    • https://fofapisobav.weebly.com/uploads/1/3/4/7/134712410/8916022.pdfIn PDF document text
    • https://texifuxifom.weebly.com/uploads/1/3/0/7/130776695/7902560.pdfIn PDF document text
    • https://wugupuvexiso.weebly.com/uploads/1/3/0/9/130969254/sozopisukeku.pdfIn PDF document text
    • https://porovepo.weebly.com/uploads/1/3/4/5/134527374/292520.pdfIn PDF document text
    • https://sazoxizifa.weebly.com/uploads/1/3/4/5/134505384/jugopuvafi-nasokepawi-misigolotoj.pdfIn PDF document text
    • http://mozovurezet.iblogger.org/dual_tree_complex_wavelet_transform_tutorial.pdfIn PDF document text
    • https://simujuzejopu.weebly.com/uploads/1/3/5/3/135305424/3029418.pdfIn PDF document text
    • https://xasukibumit.weebly.com/uploads/1/3/4/7/134749231/67902bd.pdfIn PDF document text
    • http://bafalumej.iblogger.org/92354903164.pdfIn PDF document text
    • https://ruwijupoxotafan.weebly.com/uploads/1/3/0/8/130814308/09f2991d2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sedobuxekazadi.rf.gd/uefa_champions_league_2019_games.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/vip_2_amma_amma_song.pdfIn PDF document text
    • http://nogurinuzelajer.rf.gd/architect_key_performance_indicators.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/26420967780.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/2017_maserati_ghibli_performance_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/sekuw.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/beautiful_mind_quotes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05E 5192 bytes
SHA-256: acf92909d633286561b339f8da6809115c4a961f7864bf688d6dd97f0e19500e
font_01_sfnt_off00010221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10221 11728 bytes
SHA-256: 2fd379b623f759f1926d12ae13d3f2a51709aadb60a7914e2270a256241de029
font_02_sfnt_off000128d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D9 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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