Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee9b857aca6aaf7c…

MALICIOUS

PDF

67.5 KB Created: 2021-03-17 15:14:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f123d4ff946562ec6cc35b2b252810ce SHA-1: fe294555a9e4399b55dc61efa4d0f95dc2d4ef1b SHA-256: ee9b857aca6aaf7ce73122f10b28ede5046e7d421f350aead9fd047a526f69a6
216 Risk Score

Malware Insights

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

The sample was flagged by multiple heuristics as malicious, including brand-impersonation credential phishing and a general malware detection. The presence of numerous external links, many pointing to PDF files hosted on cloud storage or personal domains, suggests a link farm or redirection strategy. One critical heuristic specifically identified a UPS brand impersonation lure directing to a Weebly-hosted PDF, indicating a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://tusixifowidafoj.weebly.com/uploads/1/3/1/4/131437116/3298564.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://xezojetit.ru/wix?keyword=i+messages+worksheet+answers PDF link annotation
    • https://tusixifowidafoj.weebly.com/uploads/1/3/1/4/131437116/3298564.pdfIn PDF document text
    • https://wituzizotavukoj.weebly.com/uploads/1/3/1/6/131606330/db0290a67.pdfIn PDF document text
    • https://defasoxajex.weebly.com/uploads/1/3/1/4/131405962/633719.pdfIn PDF document text
    • https://nopufara.weebly.com/uploads/1/3/3/9/133999240/9213136.pdfIn PDF document text
    • https://pananufizusa.weebly.com/uploads/1/3/4/4/134445813/2316379.pdfIn PDF document text
    • https://siravexadobema.weebly.com/uploads/1/3/4/3/134320718/buwibujogiv_pogewug_ramamoxal_bagixu.pdfIn PDF document text
    • https://wabalunizuwa.weebly.com/uploads/1/3/4/6/134643533/simojo.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/xukirizugukugi/2004_dodge_ram_1500_power_steering_pump_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/62024389378.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/what_does_f-x_mean.pdfIn PDF document text
    • http://rikukevez.rf.gd/54976052025.pdfIn PDF document text
    • http://wapinogure.epizy.com/tipex.pdfIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_e0f25e17c65f449a9f21f8eff48ba5fc.pdf?index=trueIn PDF document text
    • https://db7841a4-af10-4990-a2be-f084cd4acbf6.filesusr.com/ugd/e3c460_66120bb60dbe4840bb0fd7fb5d3be8af.pdf?index=trueIn PDF document text
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_9cd33c25f3c741d58c8e4fa7e27559f0.pdf?index=trueIn PDF document text
    • http://dofumuligo.rf.gd/death_by_meeting.pdfIn PDF document text
    • http://zovaner.rf.gd/zopagotu.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/41681987846.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/zewatuwituvugigebepu.pdfIn PDF document text
    • http://pidupabujufug.rf.gd/ffxiv_aetherial_wheel_prototype_vii.pdfIn PDF document text
    • https://52a1af19-6946-4c37-aba6-ab00a30e4874.filesusr.com/ugd/5dc3ca_bc3d0ca38fba4dd09b6b71c1e3851c11.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/24768817513.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA89 5160 bytes
SHA-256: e03f8be83f0aca14873c5dd868dd17a17ee08012f0770795d47f31123174ce67
font_01_sfnt_off0000dbfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFC 10264 bytes
SHA-256: f02d66998e7f9b3e895e8250846c9d4b4344eb69f72c6aabef7558ee2abc5adc

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