Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fee4d08109856d5…

MALICIOUS

PDF

75.3 KB Created: 2021-04-19 03:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7a0c830297b75a7d5325ba59d0ebfe78 SHA-1: d4e6a6dfb4200d519ba7f87a67b4826633169be0 SHA-256: 7fee4d08109856d5dd8b4808a85ba6effb6323c7978d2d7214766b7c98d3c37a
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external URIs, many pointing to disposable hosting, suggesting an attempt to redirect users to potentially malicious sites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://midufefew.ru/strik?utm_term=graco+pack+and+play+newborn+napper+weight+limit PDF link annotation
    • http://vijofudevadotar.mywebcommunity.org/beaucoup_de_bruit_pour_rien_william_shakespeare.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/gNmhc23/manual_of_chess_combinations_1b.pdfIn PDF document text
    • https://ropoxazuwaso.weebly.com/uploads/1/3/4/0/134040565/kidamuwujawojivowiv.pdfIn PDF document text
    • http://vitalia-transports.com/seziwagobafewyns7v.pdfIn PDF document text
    • https://gebejisidimi.weebly.com/uploads/1/3/5/3/135302949/1257186.pdfIn PDF document text
    • http://meetsalle.xyz/how_to_in_text_cite_a_website_with_no_author_chicagou97cr.pdfIn PDF document text
    • https://tofudilasikota.weebly.com/uploads/1/3/0/9/130969343/09a56e81ea17e2f.pdfIn PDF document text
    • https://dukalafaziwemum.weebly.com/uploads/1/3/4/7/134772398/siguvozesa.pdfIn PDF document text
    • https://cdn.sqhk.co/gasariba/jjgfjdK/yeezy_supply_slides_infant.pdfIn PDF document text
    • http://tradestaroffice.com/xuvedek8cgb.pdfIn PDF document text
    • https://cdn.sqhk.co/bolukawet/diR6gy4/retro_coffee_maker_and_toaster.pdfIn PDF document text
    • https://fuxiwuzepideka.weebly.com/uploads/1/3/1/3/131381491/jewedegofusasop_mazoxadavafela_fekijulipepe_suzif.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/48006237460.pdfIn PDF document text
    • https://mawubuzepegi.weebly.com/uploads/1/3/3/9/133989242/2dc043ecd97c734.pdfIn PDF document text
    • http://wupevijijoze.mygamesonline.org/aptitude_easy_tricks.pdfIn PDF document text
    • http://nibajafij.medianewsonline.com/31418651545.pdfIn PDF document text
    • https://cdn.sqhk.co/natokaze/hqidiGz/femugof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4eb3a9b5-ca6a-4b2a-896e-878abc754f3b.filesusr.com/ugd/f1ab86_3cff95693c41453da57d92e780a3a4f8.pdf?index=trueIn PDF document text
    • https://2559d30b-64cd-4b4d-aaad-e76a675dde99.filesusr.com/ugd/f5a024_7d2b0db9709d439fbd92cc1923150fd0.pdf?index=trueIn PDF document text
    • https://6d1a2d78-ebd2-4140-94a0-411197be5b5f.filesusr.com/ugd/88ff89_5d4d33285af14a48afc08da67479dafe.pdf?index=trueIn PDF document text
    • https://f4e740b0-69d0-4d5c-a0c7-362dc6b2ad6d.filesusr.com/ugd/0356fc_0379c9a4cf294746922ffba5aeaeea58.pdf?index=trueIn PDF document text
    • https://8ee4d174-735f-4cd7-9396-c3a65dbcc337.filesusr.com/ugd/5ac313_da491fe8dc724a73a7a78c50b6c41ae1.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE995 5736 bytes
SHA-256: e693ea8d3fe0dfe2dd6fde690914903edccbf154fb72419e48767dac1af06020
font_01_sfnt_off0000fd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD15 10024 bytes
SHA-256: 6c393ad380560f308758372d59742918f3155c8c0b95790eb2ad9ef9e57f1b2f