Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d7ef4f9cb3f2b3…

MALICIOUS

PDF

81.6 KB Created: 2021-04-23 13:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a196035b173369176027a3b44731cc9f SHA-1: d6b151ef35b7b159fe85c44c8419e614f0cc8e2d SHA-256: 93d7ef4f9cb3f2b3b970f1391b4c432662e7f56ee0d5a8265a35756a73fdba56
216 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a credential phishing lure impersonating Apple, directing users to a malicious URL. It also contains a large number of external links, suggesting a link farm or SEO poisoning attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest malicious intent for credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://nukewunokozekid.weebly.com/uploads/1/3/4/6/134678158/nufoli_midozer_suteveropo_kazudugesu.pdf.
  • 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://dafemum.ru/strik?utm_term=how+to+see+candlestick+chart+robinhood PDF link annotation
    • https://nukewunokozekid.weebly.com/uploads/1/3/4/6/134678158/nufoli_midozer_suteveropo_kazudugesu.pdfIn PDF document text
    • https://wolunogejafijut.weebly.com/uploads/1/3/4/6/134649672/xokunubuvezibap.pdfIn PDF document text
    • http://goligofalu.medianewsonline.com/blood_group_personality.pdfIn PDF document text
    • https://zavuvomexuwu.weebly.com/uploads/1/3/2/7/132740545/sawutu.pdfIn PDF document text
    • http://filuniguwol.22web.org/firefox_android_import_bookmarks_html.pdfIn PDF document text
    • http://fakaluwu.scienceontheweb.net/76273239829.pdfIn PDF document text
    • https://sodefabufu.weebly.com/uploads/1/3/4/4/134473286/dipawaj.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/gofilafixu/tegopu.pdfIn PDF document text
    • http://tasukifuputuf.epizy.com/26617161987.pdfIn PDF document text
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_4b658d5dd95b4941a59d782f82cbfed9.pdf?index=trueIn PDF document text
    • http://wipibefab.onlinewebshop.net/tilivusotukemivive.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/baker_kisti_tedavisi.pdfIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_731f8b63769e4c80a60e7b6ca4e234cd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/timeziso/72977742450.pdfIn PDF document text
    • http://jowuwivipi.rf.gd/fafirumibitixanivodoz.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/plc_programming_tutorial_in_hindi.pdfIn PDF document text
    • https://89e5ed4a-33eb-42a6-b5f1-9fc07ea1e15b.filesusr.com/ugd/ff68bb_110dd17dd7fd4d6c96c27683c9f2c742.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dekogamik/39726738605.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/pro_tech_3203_bandsaw_manual.pdfIn PDF document text
    • http://kojodidekojamu.rf.gd/beelzebub_anime_free.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/hawkes_bay_airport_annual_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/pewibafuvafudesen.pdfIn PDF document text
    • https://50b7e5d6-ab0e-41ff-bbcb-47d024e5c277.filesusr.com/ugd/45d8ab_1fc52cf8fcb04fe589f3c7d15fbf315d.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_off000101b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B7 5284 bytes
SHA-256: e632e405d37b00bfedfae9819e61cd3fd360e7d140926d973ae642d3ce0077d2
font_01_sfnt_off000113b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B1 11200 bytes
SHA-256: 97f2001bccecd5d800fed922db9476b44fbde2191fa8cf64dbda462a2cbcc868

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