Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb86bc895dc20fc4…

MALICIOUS

PDF

72.2 KB Created: 2021-04-01 13:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01bedd43b1a0472ddfb8fd20b3e37eec SHA-1: b8c1125809c9016da00799adf6ad584940bf729c SHA-256: bb86bc895dc20fc4218232c6ac267020fbba1a0b824fa3831252b71fab10062c
212 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with several heuristics indicating malicious redirector infrastructure and a link farm. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure suggest an attempt to redirect users to potentially harmful content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8129

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/award?keyword=stranded+wire+gauge+current+rating+pdf
    • https://pulimogub.weebly.com/uploads/1/3/4/3/134312020/3ca0d4a8b4d59fb.pdf
    • https://zusonugen.weebly.com/uploads/1/3/5/3/135305237/surezetutop-voxogaxu.pdf
    • http://shop-you.xyz/where_to_get_mini_cooper_s_servicedn2taw.pdf
    • http://ecoservice-vlad.ru/wagirexegavebuhmfq3.pdf
    • http://0fruit.space/check_if_bundle_is_null_androidp3gvo.pdf
    • http://vovevowumusiki.iblogger.org/850749523.pdf
    • https://nanezafukixepa.weebly.com/uploads/1/3/4/5/134526153/suzuserolomata.pdf
    • https://sopaxibifezubin.weebly.com/uploads/1/3/4/6/134608036/sorafilike.pdf
    • http://artrosil.xyz/que_es_la_anhidrasa_carbonicaips4t.pdf
    • https://woxarupuxanuma.weebly.com/uploads/1/3/1/3/131383908/gekilu-jokuvekexeno-natixilibo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cf268418-7549-4780-9cff-e39e61b5276c.filesusr.com/ugd/0b1cf2_9c596a66a24349a488189ef47a6eaa83.pdf?index=true
    • http://zesubilav.epizy.com/hidden_life_of_the_cell_answer_key.pdf
    • https://s3.amazonaws.com/vawoginele/cadmium_melody_ringtone.pdf
    • http://ruriwujuvuwa.epizy.com/libro_de_aprendizajes_clave_cuarto_grado.pdf
    • http://bosulug.epizy.com/blue_valentine_movie_filmywap.pdf
    • https://s3.amazonaws.com/siwixomudit/65834683264.pdf
    • https://s3.amazonaws.com/makixibawumebol/ghana_brass_band_songs.pdf
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_53290b9bca6440999444236de1492763.pdf?index=true
    • https://s3.amazonaws.com/jidagafinuxesu/94684502227.pdf
    • https://s3.amazonaws.com/ropidadegaxut/ergonomics_book.pdf
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_5a5c05b6913a4ae4b10e8e23dbd0fca9.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd1a.bin
380934fb4742c8e5fd1e3d3290f6669d1ff450a2988af0fe6f944cac8e8f3cb0
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1A 5308 bytes